Model: micropatch to ensure all data is included in the table model after the merge

doc/dev/documentation.org

@@ -1069,6 +1069,12 @@ gitlab-ci.
   sudo python3 -m pip install pyinstaller
 #+end_src
 
+In addition, you must install Glab[fn:glab] to allow the runner to
+proceed with the publication.
+
+[fn:glab] The Gitlab cli releases page:
+https://gitlab.com/gitlab-org/cli/-/releases
+
 *** Windows (Wine) {{{windows}}}
 
 The ci-runner environment for Wine need at least wine version 8, let

full-requirements.txt

@@ -4,7 +4,7 @@ PyQt5-sip==12.18.0
 PyQtWebEngine==5.15.6
 QScintilla>=2.14.1
 pyqtgraph>=0.12.1
-matplotlib==3.8.3
+matplotlib==3.10.8
 numpy>=1.24.2
 colorama>=0.4.3
 pyinstaller>=5.11.0
@@ -14,3 +14,4 @@ platformdirs>=4.2.0
 pyshp>=2.3.1
 rasterio==1.3.11
 #fortranformat==2.0.3
+psutil>=7.2.2

manifest.scm

@@ -20,4 +20,4 @@
        "python-pyqtgraph" "python-qscintilla"
        "python-numpy@1" "python-shapely" "python-pyshp"
        "python-matplotlib" "python-colorama"
-       "python-rasterio"))
+       "python-rasterio" "python-psutil"))

requirements.txt

@@ -4,7 +4,7 @@ PyQt5-sip==12.18.0
 #PyQtWebEngine==5.15.6
 QScintilla>=2.14.1
 pyqtgraph>=0.12.1
-matplotlib==3.8.3
+matplotlib==3.10.8
 numpy>=1.24.2
 colorama>=0.4.3
 pyinstaller>=5.11.0
@@ -14,4 +14,4 @@ platformdirs>=4.2.0
 pyshp>=2.3.1
 rasterio==1.3.11
 #fortranformat==2.0.3
-
+psutil>=7.2.2

src/Model/Ensembles/Distribution.py

@@ -0,0 +1,307 @@
+# Distribution.py -- Pamhyr
+# Copyright (C) 2026  INRAE
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# -*- coding: utf-8 -*-
+
+import struct
+import logging
+import itertools
+import numpy as np
+
+from tools import logger_exception
+
+from Model.Except import NotImplementedMethodeError
+from Model.Tools.PamhyrDB import SQLSubModel
+from Model.Scenario import Scenario
+
+logger = logging.getLogger()
+
+
+class Distribution(SQLSubModel):
+    _sub_classes = []
+
+    def __init__(self, id: int = -1,
+                 name: str = "", script: str = "",
+                 status=None):
+        super(Distribution, self).__init__(
+            id=id, status=status,
+            owner_scenario=0
+        )
+
+        self._name = name
+        self._type = "generic"
+        self._script = script
+        self._labels = []
+        self._default_values = []
+        self._params_checkers = []
+        self._params_tips = []
+
+    @property
+    def name(self):
+        return self._name
+
+    @property
+    def labels(self):
+        return self._labels
+
+    @property
+    def default_values(self):
+        return self._default_values
+
+    @classmethod
+    def _db_create(cls, execute, ext=""):
+        execute(f"""
+          CREATE TABLE ensemble_distribution{ext} (
+            {cls.create_db_add_pamhyr_id()},
+            deleted BOOLEAN NOT NULL DEFAULT FALSE,
+            name TEXT NOT NULL,
+            script TEXT NOT NULL,
+            PRIMARY KEY(pamhyr_id)
+          )
+        """)
+
+        if ext == "_tmp":
+            return True
+
+        return cls._create_submodel(execute)
+
+    @classmethod
+    def _db_update(cls, execute, version, data=None):
+        major, minor, release = version.strip().split(".")
+        if major == "0" and int(minor) < 2:
+            cls._db_create(execute)
+        elif major == "0" and int(minor) == 2:
+            if int(release) < 8:
+                cls._db_create(execute)
+
+        return cls._update_submodel(execute, version, data)
+
+    @classmethod
+    def _db_load(cls, execute, data=None):
+        new = []
+        scenario = data["scenario"]
+        loaded = data['loaded_pid']
+
+        table = execute(
+            "SELECT pamhyr_id, deleted, name, script " +
+            "FROM ensemble_distribution " +
+            f"WHERE pamhyr_id NOT IN ({', '.join(map(str, loaded))})"
+        )
+
+        for row in table:
+            it = iter(row)
+
+            id = next(it)
+            deleted = (next(it) == 1)
+            name = next(it)
+            script = next(it)
+
+            new_distribution = cls(
+                id, name=name, script=script,
+                status=data["status"]
+            )
+            if deleted:
+                new_distribution.set_as_deleted()
+
+            loaded.add(id)
+            new.append(new_distribution)
+
+        return new
+
+    def _db_save(self, execute, data=None):
+        # Only save custom distribution
+        if self._type != "custom":
+            return True
+
+        if not self.must_be_saved():
+            return True
+
+        execute(
+            "INSERT INTO " +
+            "ensemble_distribution(pamhyr_id, deleted, " +
+            "  name, script) " +
+            "VALUES (?, ?, ?, ?)",
+            self.pamhyr_id, self.is_deleted(),
+            self._name, self._script
+        )
+
+        return True
+
+    def _data_traversal(self,
+                        predicate=lambda obj, data: True,
+                        modifier=lambda obj, data: None,
+                        data={}):
+        if predicate(self, data):
+            modifier(self, data)
+
+    def is_valid_parameters(self, parameters):
+        valid = True
+        tips = []
+
+        for i, checker in enumerate(self._params_checkers):
+            ok = checker(parameters)
+            if not ok:
+                tips.append(self._params_tips[i])
+                valid = False
+
+        return (valid, tips)
+
+    def check_params(self, params):
+        return True
+
+    def random(self, r):
+        raise NotImplementedMethodeError(cls, cls._load)
+
+
+###############################
+# DISTRIBUTION IMPLEMENTATION #
+###############################
+
+class Uniform(Distribution):
+    _sub_classes = []
+
+    def __init__(self, id: int = -1,
+                 name: str = "uniform", script: str = "",
+                 status=None):
+        super(Uniform, self).__init__(
+            id=id, status=status,
+            name=name, script=script
+        )
+
+        self._labels = ["low", "high"]
+        self._default_values = [20.0, 40.0]
+        self._params_checkers = [self.check_params, self.check_params]
+        self._params_tips = ["uniform_low_tips", "uniform_high_tips"]
+
+    def check_params(self, params):
+        return (params[0] < params[1])
+
+    def random(self, params, nb):
+        lst = params.copy()
+        lst.append(nb)
+
+        return np.random.uniform(*lst)
+
+
+class Normal(Distribution):
+    _sub_classes = []
+
+    def __init__(self, id: int = -1,
+                 name: str = "normal", script: str = "",
+                 status=None):
+        super(Normal, self).__init__(
+            id=id, status=status,
+            name=name, script=script
+        )
+
+        self._labels = ["loc", "scale"]
+        self._default_values = [30.0, 5.0]
+        self._params_checkers = [self.check_params, self.check_scale]
+        self._params_tips = ["normal_loc_tips", "normal_scale_tips"]
+
+    def check_scale(self, params):
+        return 0 <= params[1]
+
+    def random(self, params, nb):
+        lst = params.copy()
+        lst.append(nb)
+
+        return np.random.normal(*lst)
+
+
+class Binomial(Distribution):
+    _sub_classes = []
+
+    def __init__(self, id: int = -1,
+                 name: str = "binomial", script: str = "",
+                 status=None):
+        super(Binomial, self).__init__(
+            id=id, status=status,
+            name=name, script=script
+        )
+
+        self._labels = ["binomial_n", "binomial_p"]
+        self._default_values = [100.0, 0.3]
+        self._params_checkers = [self.check_n, self.check_p]
+        self._params_tips = ["binomial_n_tips", "binomial_p_tips"]
+
+    def check_n(self, params):
+        n = params[0]
+        return (0 <= n) and (n == round(n))
+
+    def check_p(self, params):
+        p = params[1]
+        return 0 <= p <= 1
+
+    def random(self, params, nb):
+        lst = params.copy()
+        lst.append(nb)
+
+        return np.random.binomial(*lst)
+
+
+class Poisson(Distribution):
+    _sub_classes = []
+
+    def __init__(self, id: int = -1,
+                 name: str = "poisson", script: str = "",
+                 status=None):
+        super(Poisson, self).__init__(
+            id=id, status=status,
+            name=name, script=script
+        )
+
+        self._labels = ["poisson_lam"]
+        self._default_values = [5.0]
+        self._params_checkers = [self.check_lam]
+        self._params_tips = ["poisson_lam_tips"]
+
+    def check_lam(self, params):
+        lam = params[0]
+        return 0 <= lam
+
+    def random(self, params, nb):
+        lst = params.copy()
+        lst.append(nb)
+
+        return np.random.poisson(*lst)
+
+
+class Custom(Distribution):
+    _sub_classes = []
+
+    def __init__(self, id: int = -1,
+                 name: str = "", script: str = "",
+                 status=None):
+        super(Custom, self).__init__(
+            id=id, status=status,
+            name=name, script=script
+        )
+
+        self._labels = ["custom"]
+        self._type = "custom"
+        self._default_values = [""]
+        self._params_checkers = [self.check_params]
+        self._params_tips = ["custom_params_tips"]
+
+    def random(self, params, nb):
+        try:
+            # Run script to (re)define the sample distribution
+            f = eval(self._script)
+            return f(params, nb)
+        except Exception as e:
+            logger_exception(e)
+            return None         # TODO: Raise helpful exception

src/Model/Ensembles/DistributionList.py

@@ -0,0 +1,62 @@
+# DistributionList.py -- Pamhyr
+# Copyright (C) 2026  INRAE
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# -*- coding: utf-8 -*-
+
+from tools import trace, timer
+
+from Model.Tools.PamhyrListExt import PamhyrModelList
+from Model.Ensembles.Distribution import *
+
+
+class DistributionList(PamhyrModelList):
+    _sub_classes = [Distribution]
+
+    @classmethod
+    def _db_load(cls, execute, data=None):
+        new = cls(status=data['status'])
+
+        # Default distributions
+        d = {"status": data['status']}
+        new._lst = [
+            Uniform(**d),
+            Normal(**d),
+            Binomial(**d),
+            Poisson(**d),
+        ]
+
+        # DB custom distributions
+        new._lst += Distribution._db_load(
+            execute, data
+        )
+
+        return new
+
+    def _db_save(self, execute, data={}):
+        execute(
+            "DELETE FROM ensemble_distribution"
+        )
+
+        for fun in self._lst:
+            fun._db_save(execute, data)
+
+        return True
+
+    def new(self, index):
+        r = Custom(status=self._status)
+        self._lst.insert(index, r)
+        self._status.modified()
+        return r

src/Model/Ensembles/Ensemble.py

@@ -0,0 +1,279 @@
+# Ensemble.py -- Pamhyr
+# Copyright (C) 2026  INRAE
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# -*- coding: utf-8 -*-
+
+import struct
+import logging
+import itertools
+
+import numpy as np
+
+from Model.Tools.PamhyrDB import SQLSubModel
+from Model.Scenario import Scenario
+from Model.Ensembles.Distribution import Uniform
+
+logger = logging.getLogger()
+
+
+class Ensemble(SQLSubModel):
+    _sub_classes = []
+
+    def __init__(self, id: int = -1, name: str = "",
+                 distribution=None, params=[0., 100.],
+                 data_type=None, target_data=None,
+                 status=None, owner_scenario=-1):
+        super(Ensemble, self).__init__(
+            id=id, status=status,
+            owner_scenario=owner_scenario
+        )
+
+        self._name = name
+        self._data_type = data_type
+        self._distribution = distribution
+        self._params = params
+        self._target_data = target_data
+
+    @classmethod
+    def _db_create(cls, execute, ext=""):
+        execute(f"""
+          CREATE TABLE ensemble{ext} (
+            {cls.create_db_add_pamhyr_id()},
+            deleted BOOLEAN NOT NULL DEFAULT FALSE,
+            name TEXT NOT NULL,
+            type VARCHAR(8) NOT NULL,
+            distribution INTEGER NOT NULL,
+            distribution_name VARCHAR(32) NOT NULL,
+            params BLOB NOT NULL,
+            params_len INTEGER NOT NULL,
+            data_pid INTEGER NOT NULL,
+            {Scenario.create_db_add_scenario()},
+            {Scenario.create_db_add_scenario_fk()},
+            PRIMARY KEY(pamhyr_id, scenario)
+          )
+        """)
+
+        if ext == "_tmp":
+            return True
+
+        return cls._create_submodel(execute)
+
+    @classmethod
+    def _db_update(cls, execute, version, data=None):
+        major, minor, release = version.strip().split(".")
+        if major == "0" and int(minor) < 2:
+            cls._db_create(execute)
+        elif major == "0" and int(minor) == 2:
+            if int(release) < 8:
+                cls._db_create(execute)
+
+        return cls._update_submodel(execute, version, data)
+
+    @classmethod
+    def _db_load(cls, execute, data=None):
+        new = []
+        scenario = data["scenario"]
+        distributions = data["ens_distributions"]
+        stricklers = data["stricklers"]
+        loaded = data['loaded_pid']
+
+        table = execute(
+            "SELECT pamhyr_id, deleted, name, type, " +
+            "distribution, distribution_name, params, params_len, data_pid, " +
+            "scenario " +
+            "FROM ensemble " +
+            f"WHERE scenario = {scenario.id} " +
+            f"AND pamhyr_id NOT IN ({', '.join(map(str, loaded))})"
+        )
+
+        for row in table:
+            it = iter(row)
+
+            id = next(it)
+            deleted = (next(it) == 1)
+            name = next(it)
+            data_type = next(it)
+            fid = next(it)
+            fname = next(it)
+            params = next(it)
+            params_len = next(it)
+            data_pid = next(it)
+            owner_scenario = next(it)
+
+            def fn(f): return f._name == fname
+            if fid != -1:
+                def fn(f): return f._pamhyr_id == fid
+
+            distribution = next(
+                filter(fn, distributions.lst),
+                None
+            )
+
+            target_data = next(
+                filter(
+                    lambda s: s._pamhyr_id == data_pid,
+                    stricklers.lst
+                ),
+                None
+            )
+
+            rdata = list(cls._decode_params(params, params_len))
+
+            new_ensemble = cls(
+                id, name=name,
+                distribution=distribution,
+                params=rdata,
+                data_type=data_type,
+                target_data=target_data,
+                status=data["status"],
+                owner_scenario=owner_scenario
+            )
+            if deleted:
+                new_ensemble.set_as_deleted()
+
+            loaded.add(id)
+            new.append(new_ensemble)
+
+        return new
+
+    def _db_save(self, execute, data=None):
+        if not self.must_be_saved():
+            return True
+
+        execute(
+            "DELETE FROM ensemble " +
+            f"WHERE pamhyr_id = {self.pamhyr_id} " +
+            f"AND scenario = {self._status.scenario_id}"
+        )
+
+        bparams, length = self._encode_params()
+
+        if self._distribution is None:
+            fid = -1
+            fname = "NULL"
+        else:
+            fid = self._distribution._pamhyr_id
+            fname = self._distribution._name
+
+            if self._distribution._type == "generic":
+                fid = -1
+
+        data_pid = -1
+        if self._target_data is not None:
+            data_pid = self._target_data._pamhyr_id
+
+        execute(
+            "INSERT INTO " +
+            "ensemble(pamhyr_id, deleted, name, type, " +
+            "  distribution, distribution_name, params, params_len, " +
+            "  data_pid, scenario) " +
+            "VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)",
+            self.pamhyr_id, self.is_deleted(),
+            self._name, self._data_type,
+            fid, fname, bparams, length,
+            data_pid, self._status.scenario_id
+        )
+
+        return True
+
+    def _encode_params(self):
+        length = len(self._params)
+        data_format = ">" + ''.join(itertools.repeat("d", length))
+
+        return struct.pack(data_format, *self._params), length
+
+    @classmethod
+    def _decode_params(cls, bparams, length):
+        data_format = ">" + ''.join(itertools.repeat("d", length))
+
+        return struct.unpack(data_format, bparams)
+
+    def random(self, nb):
+        return np.nditer(
+            self._distribution.random(
+                self._params, nb
+            )
+        )
+
+    @property
+    def name(self):
+        return self._name
+
+    @name.setter
+    def name(self, name):
+        self._name = name
+        self._status.modified()
+
+    @property
+    def distribution(self):
+        return self._distribution
+
+    @distribution.setter
+    def distribution(self, distribution):
+        self._distribution = distribution
+        self._status.modified()
+
+    @property
+    def params(self):
+        return self._params
+
+    @params.setter
+    def params(self, params):
+        self._params = params
+        self._status.modified()
+
+    @property
+    def data_type(self):
+        return self._data_type
+
+    @data_type.setter
+    def data_type(self, data_type):
+        self._data_type = data_type
+        self._status.modified()
+
+    @property
+    def target_data(self):
+        return self._target_data
+
+    @target_data.setter
+    def target_data(self, target_data):
+        self._target_data = target_data
+        self._status.modified()
+
+    def get_data_dict(self, use_ids=False):
+        target_data = self.target_data
+        distribution = self.distribution
+
+        if use_ids:
+            if self.target_data:
+                target_data = self.target_data.pamhyr_id
+            if self.distribution:
+                distribution = self.distribution.name
+
+        return {
+            "name": self.name,
+            "data_type": self.data_type,
+            "target_data": target_data,
+            "distribution": distribution,
+            "params": self.params,
+        }
+
+    def set_data_dict(self, data):
+        self.name = data["name"]
+        self.data_type = data["data_type"]
+        self.target_data = data["target_data"]
+        self.distribution = data["distribution"]
+        self.params = data["params"]

src/Model/Ensembles/EnsembleList.py

@@ -0,0 +1,62 @@
+# EnsembleList.py -- Pamhyr
+# Copyright (C) 2026  INRAE
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# -*- coding: utf-8 -*-
+
+from tools import trace, timer
+
+from Model.Tools.PamhyrListExt import PamhyrModelList
+from Model.Ensembles.Ensemble import Ensemble
+
+
+class EnsembleList(PamhyrModelList):
+    _sub_classes = [Ensemble]
+
+    @classmethod
+    def _db_load(cls, execute, data=None):
+        new = cls(status=data['status'])
+
+        new._lst = Ensemble._db_load(
+            execute, data
+        )
+
+        return new
+
+    def _db_save(self, execute, data=None):
+        execute(
+            "DELETE FROM ensemble " +
+            f"WHERE scenario = {self._status.scenario_id}"
+        )
+
+        for ens in self._lst:
+            ens._db_save(execute, data=data)
+
+        return True
+
+    def new(self, index):
+        r = Ensemble(status=self._status)
+        self._lst.insert(index, r)
+        self._status.modified()
+        return r
+
+    def new_with_data(self, index, data):
+        r = Ensemble(status=self._status)
+
+        r.set_data_dict(data)
+
+        self._lst.insert(index, r)
+        self._status.modified()
+        return r

src/Model/Geometry/ProfileXYZ.py

@@ -158,7 +158,7 @@ class ProfileXYZ(Profile, SQLSubModel):
                 )
 
         if major == "0" and int(minor) <= 2:
-            if int(release) < 9:
+            if int(release) < 10:
                 execute(
                     "ALTER TABLE geometry_profileXYZ " +
                     "ADD COLUMN enabled BOOLEAN NOT NULL DEFAULT TRUE"
@@ -862,6 +862,13 @@ class ProfileXYZ(Profile, SQLSubModel):
 
         return n_zones
 
+    def froude(self, z, v):
+        return v / np.sqrt(
+            9.81 * (
+                self.wet_area(z) / self.wet_width(z)
+            )
+        )
+
     @timer
     def get_all_water_limits_ac(self, z):
         """

src/Model/Results/Results.py

@@ -272,9 +272,9 @@ class TableData(SQLSubModel):
 
         if len(shape) == 2:
             shape_x, shape_y = shape
-        elif len(shape == 1):
+        elif len(shape) == 1:
             shape_x, = shape
-        elif len(shape == 3):
+        elif len(shape) == 3:
             shape_x, shape_y, shape_z = shape
         else:
             logger.error(
@@ -326,14 +326,14 @@ class TableData(SQLSubModel):
         if isinstance(key, tuple):
             return self._data[key[0], key[1]]
 
-        self._date[key]
+        self._data[key]
 
 
 class Results(SQLSubModel):
     _sub_classes = [River, TableData, AdditionalData]
 
     def __init__(self, id=-1, study=None, solver=None,
-                 repertory="", name="0"):
+                 repertory="", name="0", is_ensemble=False):
         super(Results, self).__init__(
             id=id, status=study.status,
             owner_scenario=study.status.scenario.id
@@ -341,11 +341,14 @@ class Results(SQLSubModel):
 
         self._name = name
         self._study = study
-        self._river = River(self._study, self)
+        # Solver readers add their own reaches; ensembles need them upfront.
+        self._river = River(self._study, self, init=is_ensemble)
 
         self._solver = solver
         self._repertory = repertory
 
+        self._is_ensemble = is_ensemble
+
         self._meta_data = {
             # Keep results creation date
             "creation_date": datetime.now(),
@@ -359,6 +362,9 @@ class Results(SQLSubModel):
         if solver is not None:
             self.set("solver_type", solver._type)
 
+    def is_ensemble(self):
+        return self._is_ensemble
+
     @property
     def date(self):
         date = self._meta_data["creation_date"]
@@ -426,9 +432,11 @@ class Results(SQLSubModel):
             solver_name TEXT NOT NULL,
             solver_type TEXT NOT NULL,
             study_revision INTEGER NOT NULL,
-            creation_data DATE NOT NULL,
+            creation_date DATE NOT NULL,
             nb_timestamps INTEGER NOT NULL,
             timestamps BLOB NOT NULL,
+            seed INTEGER,
+            number_of_run INTEGER,
             {Scenario.create_db_add_scenario()},
             {Scenario.create_db_add_scenario_fk()},
             PRIMARY KEY(pamhyr_id, scenario)
@@ -454,6 +462,21 @@ class Results(SQLSubModel):
                 cls._db_create(execute)
                 create = True
 
+        if major == "0" and int(minor) <= 2:
+            if int(release) < 9 and not create:
+                execute(
+                    "ALTER TABLE results ADD COLUMN " +
+                    "seed INTEGER"
+                )
+                execute(
+                    "ALTER TABLE results ADD COLUMN " +
+                    "number_of_run INTEGER"
+                )
+                execute(
+                    "ALTER TABLE results RENAME COLUMN " +
+                    "creation_data TO creation_date"
+                )
+
         return cls._update_submodel(execute, version, data)
 
     @classmethod
@@ -466,7 +489,9 @@ class Results(SQLSubModel):
 
         table = execute(
             "SELECT pamhyr_id, solver_name, solver_type, " +
-            "study_revision, creation_data, nb_timestamps, timestamps, " +
+            "study_revision, creation_date, " +
+            "seed, number_of_run, " +
+            "nb_timestamps, timestamps, " +
             "scenario " +
             "FROM results " +
             f"WHERE scenario = {scenario.id}"
@@ -486,6 +511,8 @@ class Results(SQLSubModel):
             solver_type = next(it)
             revision = next(it)
             creation_date = next(it)
+            seed = next(it)
+            number_of_run = next(it)
             nb_timestamps = next(it)
             timestamps_bytes = next(it)
             owner_scenario = next(it)
@@ -496,6 +523,9 @@ class Results(SQLSubModel):
             new_results.set("solver_type", solver_type)
             new_results.set("study_revision", revision)
             new_results.set("creation_date", creation_date)
+            if seed is not None:
+                new_results.set("seed", seed)
+                new_results.set("number_of_run", number_of_run)
 
             data["result_pid"] = pid
             data["result"] = new_results
@@ -588,15 +618,25 @@ class Results(SQLSubModel):
         ts = sorted(self.get("timestamps"))
         sf = ">" + ''.join(itertools.repeat("d", len(ts)))
 
+        if "seed" in self._meta_data:
+            seed = int(self.get("seed"))
+            number_of_run = int(self.get("number_of_run"))
+        else:
+            seed = None
+            number_of_run = None
+
         execute(
             "INSERT INTO " +
             "results (pamhyr_id, solver_name, solver_type, " +
-            "study_revision, creation_data, " +
+            "study_revision, creation_date, " +
+            "seed, number_of_run, " +
             "nb_timestamps, timestamps, " +
-            "scenario) VALUES (?, ?, ?, ?, ?, ?, ?, ?)",
+            "scenario) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)",
             self._pamhyr_id, solver_name, solver_type,
             self._status.version, self.get("creation_date"),
-            len(ts), struct.pack(sf, *ts), self._owner_scenario
+            seed, number_of_run,
+            len(ts), struct.pack(sf, *ts),
+            self._owner_scenario
         )
 
         data["result"] = self._pamhyr_id

src/Model/Results/River/River.py

@@ -403,7 +403,7 @@ class Reach(SQLSubModel):
 class River(SQLSubModel):
     _sub_classes = [Reach]
 
-    def __init__(self, study, parent):
+    def __init__(self, study, parent, init=True):
         super(River, self).__init__(
             id=-1, status=study.status,
             owner_scenario=study.status.scenario.id
@@ -414,6 +414,9 @@ class River(SQLSubModel):
 
         # Dict with timestamps as key
         self._reachs = []
+        if init:
+            for i, _ in enumerate(self._study.river.enable_edges()):
+                self.add(i)
 
     def __len__(self):
         return len(self._reachs)
@@ -453,7 +456,7 @@ class River(SQLSubModel):
 
             reach.update_water_limits(
                 timestamp,
-                data[ind[0]:ind[1]]
+                data[ind[0]:ind[1] + 1]
             )
 
     @classmethod
@@ -469,7 +472,7 @@ class River(SQLSubModel):
         study = data["study"]
         parent = data["parent"]
 
-        new_river = cls(study, parent)
+        new_river = cls(study, parent, init=False)
 
         for reach in study.river.reachs():
             data["reach"] = reach.reach

src/Model/River.py

@@ -69,6 +69,7 @@ from Model.WeatherParameters.WeatherParametersList \
     import WeatherParametersList
 
 from Model.GeoTIFF.GeoTIFFList import GeoTIFFList
+from Model.Ensembles.EnsembleList import EnsembleList
 from Model.Results.Results import Results
 
 logger = logging.getLogger()
@@ -487,6 +488,7 @@ class River(Graph):
         BoundaryConditionsTemperatureList,
         WeatherParametersList,
         GeoTIFFList,
+        EnsembleList,
         Results
     ]
 
@@ -532,6 +534,9 @@ class River(Graph):
 
         self._geotiff = GeoTIFFList(status=self._status)
 
+        # Scenario ensemble
+        self._ensembles = EnsembleList(status=self._status)
+
         self._results = {}
 
     @classmethod
@@ -650,6 +655,8 @@ class River(Graph):
 
         new._geotiff = GeoTIFFList._db_load(execute, data)
 
+        new._ensembles = EnsembleList._db_load(execute, data)
+
         return new
 
     def _db_load_results(self, execute, data=None):
@@ -688,6 +695,8 @@ class River(Graph):
 
         objs.append(self._geotiff)
 
+        objs.append(self._ensembles)
+
         for solv_type in self.results:
             objs.append(self.results[solv_type])
 
@@ -766,7 +775,7 @@ class River(Graph):
             self._InitialConditionsTemperature,
             self._BoundaryConditionsTemperature,
             self._WeatherParameters,
-            self._geotiff,
+            self._geotiff, self._ensembles,
         ]
 
         for solver in self._parameters:

src/Model/Scenario.py

@@ -58,6 +58,7 @@ class Scenario(SQLSubModel):
         "initial_conditions_temperature",
         "initial_conditions_temperature_spec",
         "weather_parameters", "weather_parameters_data",
+        "ensemble",
     ]
 
     related_tables = tables_with_deleted_column + [
@@ -72,6 +73,7 @@ class Scenario(SQLSubModel):
                  name: str = "",
                  description: str = "",
                  x: int = 1000.0, y: int = 1000.0,
+                 is_ensemble: bool = False,
                  revision: int = 0,
                  parent=None):
         super(Scenario, self).__init__()
@@ -81,6 +83,7 @@ class Scenario(SQLSubModel):
         self._x, self._y = x, y
         self._name = name
         self._description = description
+        self._is_ensemble = is_ensemble
         self._revision = revision
         self._parent = parent
 
@@ -103,6 +106,7 @@ class Scenario(SQLSubModel):
             y REAL NOT NULL DEFAULT 1000,
             name TEXT NOT NULL,
             description TEXT NOT NULL,
+            is_ensemble BOOL DEFAULT FALSE,
             revision INTEGER NOT NULL,
             parent_id INTEGER REFERENCES scenario(id)
           )
@@ -138,6 +142,13 @@ class Scenario(SQLSubModel):
             cls._db_create(execute)
             cls._db_add_default(execute)
 
+        if major == "0" and int(minor) == 2:
+            if int(release) < 8:
+                execute(
+                    f"ALTER TABLE scenario " +
+                    "ADD COLUMN is_ensemble BOOL DEFAULT FALSE"
+                )
+
         return True
 
     @classmethod
@@ -158,7 +169,8 @@ class Scenario(SQLSubModel):
         scenarios = {}
 
         table = execute(
-            "SELECT id, x, y, name, description, revision, parent_id " +
+            "SELECT id, x, y, name, description, " +
+            "  is_ensemble, revision, parent_id " +
             "FROM scenario " +
             "ORDER BY id ASC"
         )
@@ -170,6 +182,7 @@ class Scenario(SQLSubModel):
             x, y = next(it), next(it)
             name = next(it)
             desc = next(it)
+            is_ens = next(it)
             revi = next(it)
             parent = next(it)
 
@@ -179,7 +192,9 @@ class Scenario(SQLSubModel):
             new = cls(
                 id=id, x=x, y=y,
                 name=name, description=desc,
-                revision=revi, parent=parent
+                is_ensemble=is_ens,
+                revision=revi,
+                parent=parent
             )
             scenarios[id] = new
 
@@ -189,21 +204,18 @@ class Scenario(SQLSubModel):
         if self.is_deleted():
             return self.drop_all(execute)
 
-        parent = 'NULL'
+        parent = None
         if self.parent is not None:
             parent = self.parent._id
 
         execute(
             "INSERT OR REPLACE INTO " +
-            "scenario(id, x, y, name, description, revision, parent_id) " +
+            "scenario(id, x, y, name, description, " +
-            "VALUES (" +
+            "  is_ensemble, revision, parent_id) " +
-            f"{self._id}, " +
+            "VALUES (?, ?, ?, ?, ?, ?, ?, ?)",
-            f"{self.x}, {self.y}, " +
+            self._id, self.x, self.y,
-            f"'{self._db_format(self.name)}', " +
+            self.name, self.description, self._is_ensemble,
-            f"'{self._db_format(self.description)}', " +
+            self._revision, parent
-            f"{self._revision}, " +
-            f"{parent}" +
-            ")"
         )
 
         return True
@@ -328,6 +340,9 @@ class Scenario(SQLSubModel):
     def parent(self):
         return self._parent
 
+    def is_ensemble(self):
+        return self._is_ensemble
+
     def set_pos(self, x, y):
         self._x = x
         self._y = y
@@ -345,6 +360,8 @@ class Scenario(SQLSubModel):
             return self.name
         if key == "description":
             return self.description
+        if key == "is_ensemble":
+            return self.is_ensemble()
         if key == "parent":
             return self.parent
 

src/Model/Scenarios.py

@@ -57,8 +57,11 @@ class Scenarios(PamhyrModelDict):
 
         return None
 
-    def new(self, parent):
+    def new(self, parent, is_ensemble=False):
-        new = Scenario(parent=parent)
+        new = Scenario(
+            parent=parent,
+            is_ensemble=is_ensemble
+        )
         self.set(new._id, new)
         return new
 

src/Model/Study.py

@@ -34,6 +34,7 @@ from Model.Except import NotImplementedMethodeError
 from Model.River import River
 from Model.TimeShift import shift_river_times, shift_database_times
 from Model.Geometry.Reach import Reach
+from Model.Ensembles.DistributionList import DistributionList
 from Model.HydraulicStructures.HydraulicStructures import (
     HydraulicStructure
 )
@@ -51,6 +52,7 @@ class Study(SQLModel):
 
     _sub_classes = [
         Scenario,
+        DistributionList,
         River,
     ]
 
@@ -86,6 +88,9 @@ class Study(SQLModel):
             self.scenarios = Scenarios(status=self.status)
             self.scenarios[0] = s0
             self.status.scenario = s0
+
+            self._ens_distributions = DistributionList(status=self.status)
+
             self._river = River(status=self.status)
         else:
             self._init_db_file(filename, is_new=False)
@@ -406,12 +411,19 @@ class Study(SQLModel):
                 lambda a, s: a or (s.parent is scenario),
                 new.scenarios.lst,
                 False
-        ):
+        ) or scenario.is_ensemble():
             new.status.set_as_read_only()
 
         data["scenario"] = scenario
         data["loaded_pid"] = set()
 
+        # Get ensemble distribution
+        new._ens_distributions = DistributionList._db_load(
+            sql_exec, data=data
+        )
+
+        data["ens_distributions"] = new._ens_distributions
+
         # Load river data
         new._river = River._db_load(
             sql_exec, data=data
@@ -483,8 +495,27 @@ class Study(SQLModel):
                 raise
             self._pending_time_offset = 0.0
 
+        if self.status.scenario.is_ensemble():
+            lst = [
+                self.scenarios, self._ens_distributions,
+                self._river._ensembles,
+            ]
+            for solv in self._river._results:
+                lst.append(self._river._results[solv])
+
+            self._save_submodel(
+                lst, data=progress
+            )
+            progress()
+            self.commit()
+
+            return
+
         self._save_submodel(
-            [self.scenarios, self._river],
+            [
+                self.scenarios, self._ens_distributions,
+                self._river
+            ],
             data=progress
         )
 
@@ -602,7 +633,8 @@ class Study(SQLModel):
         data = {
             "status": self.status,
             "loaded_pid": set(),
-            "scenario": scenario
+            "scenario": scenario,
+            "ens_distributions": self._ens_distributions,
         }
 
         self.status.start_loading()
@@ -679,6 +711,7 @@ class Study(SQLModel):
                     self.status.scenario.y + 100)
 
         new.name = self.status.scenario.name + " (copy)"
+        new.is_ensemble = self.status.scenario.is_ensemble
 
         self.status.scenario = new
         self.river._data_traversal(
@@ -690,6 +723,25 @@ class Study(SQLModel):
         self.status.set_as_editable()
         return new
 
+    def create_ensemble_scenario(self, pos=None, switch=True):
+        new = self.scenarios.new(
+            self.status.scenario,
+            is_ensemble=True
+        )
+
+        new.name = self.status.scenario.name + " (ensemble)"
+        if pos is not None:
+            new.set_pos(pos.x(), pos.y())
+        else:
+            new.set_pos(self.status.scenario.x + 100,
+                        self.status.scenario.y)
+
+        if switch:
+            self.status.scenario = new
+
+        self.status.set_as_read_only()
+        return new
+
     @property
     def results(self):
         return self._river.results

src/Model/Tools/PamhyrDB.py

@@ -185,6 +185,13 @@ class SQLSubModel(PamhyrID):
         else:
             self._owner_scenario = owner_scenario
 
+    def __str__(self):
+        t = type(self)
+        return (
+            f"'{t.__module__}.{t.__name__}" +
+            f"@{self._pamhyr_id}.{self._owner_scenario}'"
+        )
+
     def must_be_saved(self):
         """Return True if this object MUST be save in the save file.
 

src/Model/WeatherParameters/WeatherParameters.py

@@ -341,7 +341,7 @@ class WeatherParameters(SQLSubModel):
         created = False
 
         if major == "0" and (int(minor) < 2 or
-                             (int(minor) == 2 and int(release) <= 7)):
+                             (int(minor) == 2 and int(release) < 10)):
             if not cls.is_table_exists(execute, "air_temperature"):
                 cls._db_create(execute)
                 created = True

src/Solver/Mage.py

@@ -1063,6 +1063,75 @@ class Mage8(Mage):
             logger_exception(e)
             return False
 
+    def export_ensemble_variation(self, study, repertory,
+                                  qlog=None, name="0",
+                                  samples=None):
+        self._study = study
+        name = study.name.replace(" ", "_")
+
+        var_samples = self._export_ensemble_RUG(
+            study, repertory,
+            qlog, name=name,
+            samples=samples,
+        )
+
+        return var_samples
+
+    def _export_ensemble_RUG(self, study, repertory,
+                             qlog, name="0",
+                             samples={}):
+        files = []
+        var_samples = []
+
+        for ens in samples:
+            if ens.target_data is None:
+                continue
+
+            x = next(samples[ens])
+            var_samples.append(x)
+
+            qlog.put(f"*** Variation " +
+                     f"'{ens.target_data}' - {ens.data_type} x {x}")
+
+            if ens.data_type == "strickler_minor":
+                ens.target_data.minor = x
+            elif ens.data_type == "strickler_medium":
+                ens.target_data.medium = x
+
+        if qlog is not None:
+            qlog.put("Export variation of RUG file")
+
+        # Write header
+        with mage_file_open(os.path.join(repertory, f"{name}.RUG"), "w+") as f:
+            files.append(f"{name}.RUG")
+
+            edges = study.river.enable_edges()
+
+            id = 1
+            for edge in edges:
+                frictions = edge.frictions
+
+                for friction in frictions.frictions:
+                    if friction.begin_strickler is None:
+                        continue
+
+                    if friction.is_deleted():
+                        continue
+
+                    num = f"{id:>3}"
+                    brk = f"{friction.begin_rk:>10.3f}"
+                    erk = f"{friction.end_rk:>10.3f}"
+
+                    strickler = friction.begin_strickler
+                    coef_1 = f"{strickler.minor:>10.3f}"
+                    coef_2 = f"{strickler.medium:>10.3f}"
+
+                    f.write(f"K{num}      {brk}{erk}{coef_1}{coef_2}\n")
+
+                id += 1
+
+        return var_samples
+
     ###########
     # RESULTS #
     ###########
@@ -1493,6 +1562,171 @@ class Mage8(Mage):
 
         return results
 
+    @timer
+    def read_ensemble_bin(self, study, fname, tables, run_number, qlog=None):
+        logger.info(f"read_ensemble_bin: Start reading '{fname}' ...")
+        start = time.time()
+
+        with mage_file_open(fname, "r") as f:
+            def newline(): return np.fromfile(f, dtype=np.int32, count=1)
+            def endline(): return np.fromfile(f, dtype=np.int32, count=1)
+
+            def read_int(size): return np.fromfile(
+                f, dtype=np.int32, count=size)
+
+            def read_float(size): return np.fromfile(
+                f, dtype=np.float32, count=size)
+
+            def read_float64(size): return np.fromfile(
+                f, dtype=np.float64, count=size)
+
+            # Meta data (1st line)
+            newline()
+            data = read_int(3)
+
+            nb_reach = data[0]
+            nb_profile = data[1]
+            mage_version = data[2]
+
+            if mage_version <= 80:
+                msg = (
+                    "Read BIN files: " +
+                    f"Possible incompatible mage version '{mage_version}', " +
+                    "please check your solver configuration..."
+                )
+                logger.warning(msg)
+
+                if qlog is not None:
+                    qlog.put("[WARNING] " + msg)
+
+            endline()
+
+            # Reach information (2nd line)
+            newline()
+            _ = read_int(2*nb_reach)
+            endline()
+
+            # X (3rd line)
+            newline()
+            _ = read_float(nb_profile)
+            endline()
+
+            # Z and Y (4th line)
+            newline()
+            _ = read_float(3*nb_profile)
+            endline()
+
+            # Data
+            newline()
+
+            ts = set()
+
+            tmp_table = {}
+            end = False
+            while not end:
+                n = read_int(1)[0]
+                timestamp = read_float64(1)[0]
+                key = bytearray(
+                    np.fromfile(
+                        f, dtype=np.byte, count=1
+                    )
+                ).decode()
+                data = read_float(n)
+
+                if key not in tmp_table:
+                    tmp_table[key] = []
+
+                tmp_table[key].append(data)
+
+                ts.add(timestamp)
+
+                endline()
+                end = newline().size <= 0
+
+            table = {}
+            for k in tmp_table:
+                table[k] = np.array(tmp_table[k])
+
+            self.read_ensemble_bin_agregate_data(
+                table, tables, run_number
+            )
+
+            tables["timestamps"] = ts
+
+        logger.info(f"reading time: '{time.time() - start}'")
+
+    def read_ensemble_bin_agregate_data(self, tables, res, run_number):
+        z = tables["Z"]
+        q = tables["Q"]
+
+        if "z_mean" not in res:
+            res["z_mean"] = z
+            res["q_mean"] = q
+
+            res["z_tmp_M2"] = np.zeros(z.shape)
+            res["q_tmp_M2"] = np.zeros(q.shape)
+
+            res["z_std_derivation"] = np.zeros(z.shape)
+            res["q_std_derivation"] = np.zeros(q.shape)
+
+            res["z_min"] = z
+            res["z_max"] = z
+
+            res["q_min"] = q
+            res["q_max"] = q
+        else:
+            # Get mean results for Z and Q
+            n = run_number
+            for x, txt in [(z, "z"), (q, "q")]:
+                t_mean = f"{txt}_mean"
+                t_M2 = f"{txt}_tmp_M2"
+                t_std_deriv = f"{txt}_std_derivation"
+
+                delta = x - res[t_mean]
+
+                res[t_mean] += delta / n
+
+                delta_2 = x - res[t_mean]
+
+                res[t_M2] += delta * delta_2
+                res[t_std_deriv] = np.sqrt(res[t_M2] / n)
+
+            # Z and Q min max values
+            res["z_min"] = np.minimum(z, res["z_min"])
+            res["z_max"] = np.maximum(z, res["z_max"])
+            res["q_min"] = np.minimum(q, res["q_min"])
+            res["q_max"] = np.maximum(q, res["q_max"])
+
+    @timer
+    def results_ensemble(self, study, repertory,
+                         tables, run_number,
+                         qlog=None, name=None):
+        self._study = study
+        if name is None:
+            name = study.name.replace(" ", "_")
+
+        fname = os.path.join(repertory, f"{name}.BIN".replace(" ", "_"))
+        if not os.path.isfile(fname):
+            logger.info(f"Result file {name}.BIN does not exist")
+            return None
+        try:
+            self.read_ensemble_bin(study, fname, tables, run_number, qlog)
+        except Exception as e:
+            logger.error(f"Failed to read results")
+            logger_exception(e)
+            return None
+
+        return True
+
+    def get_ensemble_empty_results(self, study, repertory, name=None):
+        return Results(
+            study=study,
+            solver=self,
+            repertory=repertory,
+            name=name,
+            is_ensemble=True,
+        )
+
 
 class MageFake7(Mage8):
     _type = "mage_fake7"

src/View/Debug/Window.py

@@ -16,6 +16,8 @@
 
 # -*- coding: utf-8 -*-
 
+import os
+import psutil
 import logging
 import traceback
 
@@ -120,7 +122,10 @@ class TimerWindow(PamhyrWindow):
             parent=parent
         )
 
+        self._process = psutil.Process(os.getpid())
+
         self.setup_table()
+        self.setup_label()
         self.setup_alarm()
         self.setup_connections()
 
@@ -136,6 +141,15 @@ class TimerWindow(PamhyrWindow):
             data=None,
         )
 
+    def setup_label(self):
+        label = self.find(QLabel, "label")
+        label.setText(
+            f" Memory usage:\t" +
+            "<b>" +
+            f"{self._process.memory_info().rss / (1000 * 1000):.3f}" +
+            "</b> MB"
+        )
+
     def setup_alarm(self):
         self._alarm = QTimer()
         self._alarm.start(2000)
@@ -148,6 +162,7 @@ class TimerWindow(PamhyrWindow):
 
     def update(self):
         self._table.update_lst()
+        self.setup_label()
 
     # def reset(self):
     #     self._table.reset_timers()

src/View/Ensembles/Edit/Translate.py

@@ -0,0 +1,64 @@
+# Translate.py -- Pamhyr
+# Copyright (C) 2023-2026  INRAE
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# -*- coding: utf-8 -*-
+
+from PyQt5.QtCore import QCoreApplication
+
+from View.Ensembles.Translate import EnsemblesTranslate
+
+_translate = QCoreApplication.translate
+
+
+class EnsembleEditTranslate(EnsemblesTranslate):
+    def __init__(self):
+        super(EnsembleEditTranslate, self).__init__()
+
+        self._dict["binomial_n"] = _translate("Ensemble", "n")
+        self._dict["binomial_p"] = _translate("Ensemble", "p")
+
+        self._dict["poisson_lam"] = _translate("Ensemble", "Lam")
+
+        self._dict["checker_failed_title"] = _translate(
+            "Ensemble",
+            "Invalid parameter"
+        )
+        self._dict["checker_failed_text"] = _translate(
+            "Ensemble",
+            "This parameter is not valid for selected distribution: "
+        )
+
+        uniform = _translate(
+            "Ensemble", "(High - Low) must be non-negative."
+        )
+        self._dict["uniform_low_tips"] = uniform
+        self._dict["uniform_high_tips"] = uniform
+
+        self._dict["normal_scale_tips"] = _translate(
+            "Ensemble", "Scale must be non-negative."
+        )
+
+        self._dict["binomial_n_tips"] = _translate(
+            "Ensemble", "N must be non-negative and must be an integers."
+        )
+
+        self._dict["binomial_p_tips"] = _translate(
+            "Ensemble", "P must be >= 0 and <=1."
+        )
+
+        self._dict["poisson_lam_tips"] = _translate(
+            "Ensemble", "Lam must be >= 0."
+        )

src/View/Ensembles/Edit/Window.py

@@ -0,0 +1,320 @@
+# Window.py -- Pamhyr
+# Copyright (C) 2023-2026  INRAE
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# -*- coding: utf-8 -*-
+
+import logging
+
+from tools import trace, timer, logger_exception
+
+from View.Tools.PamhyrWindow import PamhyrWindow, PamhyrDialog
+from View.Tools.PamhyrWidget import PamhyrWidget
+from View.Tools.PamhyrTree import (
+    PamhyrModelItem, PamhyrModelListItem,
+)
+
+from PyQt5.QtGui import (
+    QKeySequence,
+)
+
+from PyQt5 import QtWidgets
+from PyQt5.QtCore import (
+    Qt, QVariant, QAbstractTableModel,
+    QCoreApplication, QModelIndex, pyqtSlot,
+    QRect, QSettings,
+)
+
+from PyQt5.QtWidgets import (
+    QDialogButtonBox, QPushButton, QLineEdit,
+    QFileDialog, QTableView, QAbstractItemView,
+    QUndoStack, QShortcut, QAction, QItemDelegate,
+    QComboBox, QVBoxLayout, QHeaderView, QTabWidget,
+    QGroupBox, QTreeWidget,
+)
+
+from View.Ensembles.Edit.Translate import EnsembleEditTranslate
+
+logger = logging.getLogger()
+
+
+class StricklersCoefModelItem(PamhyrModelItem):
+    def get_value(self):
+        return (self._data, self.parent()._data)
+
+
+class StricklersModelItem(PamhyrModelItem):
+    def __init__(self, data=None, trad=None, parent=None):
+        super(StricklersModelItem, self).__init__(
+            data=data, trad=trad, parent=parent,
+        )
+
+    def _setup_children(self):
+        for coef in ["strickler_minor", "strickler_medium"]:
+            self.addChild(
+                StricklersCoefModelItem(data=coef, parent=self)
+            )
+
+    def get_value(self):
+        return self._data
+
+
+class EnsembleEditDialog(PamhyrDialog):
+    _pamhyr_ui = "EnsembleEditDialog"
+    _pamhyr_name = "Parameters"
+
+    def __init__(self, study=None, ensemble=None,
+                 parent=None):
+        trad = EnsembleEditTranslate()
+
+        super(EnsembleEditDialog, self).__init__(
+            title=trad[self._pamhyr_name],
+            trad=trad,
+            options=[],
+            parent=parent
+        )
+
+        self._study = study
+        self._ensemble = ensemble
+        self._target_data = None
+
+        self._tree = self.find(QTreeWidget, "treeWidget_target_data")
+        self._tg_group_box = self.find(QGroupBox, "groupBox_target_data")
+
+        self._init_tree()
+        self._init_default_values()
+        self._init_connection()
+
+    def _init_tree(self):
+        self._tree.setColumnCount(1)
+        self._tree.setHeaderLabels(["Name"])
+
+        stricklers = PamhyrModelListItem(
+            name="Stricklers",
+            lst=self._study.river.stricklers,
+            child_item_ctor=StricklersModelItem,
+            parent=self._tree
+        )
+
+        self._target_data = (
+            self._ensemble.data_type,
+            self._ensemble.target_data
+        )
+
+        self._tg_group_box.setTitle(
+            self._format_target_data(self._target_data)
+        )
+
+        item = stricklers.find_item_by_value(self._target_data)
+        if item:
+            self._tree.setCurrentItem(item)
+
+    def _init_default_values(self):
+        self.set_line_edit_text("lineEdit_name", self._ensemble.name)
+
+        self.combobox_add_items(
+            "comboBox_distribution",
+            [self._trad["not_defined"]] +
+            list(
+                map(
+                    lambda d: d.name,
+                    self._study._ens_distributions.lst
+                )
+            )
+        )
+
+        self._params_widget = None
+        if self._ensemble.distribution is not None:
+            self.set_combobox_text("comboBox_distribution",
+                                   self._ensemble.distribution.name)
+
+            self._set_widget(self._ensemble.distribution)
+
+    def _init_connection(self):
+        self.find(QComboBox, "comboBox_distribution")\
+            .currentTextChanged.connect(self.update_distribution)
+
+        self._tree.itemClicked.connect(self._tree_item_select)
+
+    def _tree_item_select(self, item):
+        if type(item) is StricklersCoefModelItem:
+            self._target_data = item.get_value()
+
+            self._tg_group_box.setTitle(
+                self._format_target_data(self._target_data)
+            )
+
+    def _format_target_data(self, data):
+        return f" Selection: {str(data[1])}, {data[0]}"
+
+    def update_distribution(self, txt):
+        # txt = self.get_combobox_text("comboBox_distribution")
+        distribution = next(
+            filter(
+                lambda d: d.name == txt,
+                self._study._ens_distributions.lst
+            ),
+            None
+        )
+
+        self._set_widget(distribution)
+
+    def _set_widget(self, distribution):
+        box = self.find(QGroupBox, "groupBox_params")
+        vbox = self.find(QVBoxLayout, "verticalLayout_params")
+
+        if self._params_widget is not None:
+            vbox.removeWidget(self._params_widget)
+            self._params_widget.setParent(None)
+
+        if distribution is None:
+            return
+
+        size = len(distribution._labels)
+        if size == 1:
+            self._params_widget = Ensemble1ParamsWidget(
+                ensemble=self._ensemble,
+                distribution=distribution,
+                trad=self._trad, parent=box,
+            )
+            vbox.addWidget(self._params_widget)
+        elif size == 2:
+            self._params_widget = Ensemble2ParamsWidget(
+                ensemble=self._ensemble,
+                distribution=distribution,
+                trad=self._trad, parent=box,
+            )
+            vbox.addWidget(self._params_widget)
+        else:
+            self._params_widget = None
+
+    @property
+    def values(self):
+        return self._values
+
+    def accept(self):
+        txt = self.get_combobox_text("comboBox_distribution")
+        distribution = next(
+            filter(
+                lambda d: d.name == txt,
+                self._study._ens_distributions.lst
+            ),
+            None
+        )
+        parameters = self._params_widget.values
+
+        if distribution is not None:
+            ok, tips = distribution.is_valid_parameters(parameters)
+            if not ok:
+                self.message_box(
+                    text=self._trad["checker_failed_text"],
+                    informative_text="\n".join(
+                        map(lambda t: " - " + self._trad[t], tips)
+                    ),
+                    window_title=self._trad["checker_failed_title"],
+                )
+                return
+
+        self._values = {
+            "name": self.get_line_edit_text("lineEdit_name"),
+            "data_type": self._target_data[0],
+            "target_data": self._target_data[1],
+            "distribution": distribution,
+            "params": parameters,
+        }
+
+        super().accept()
+
+    def reject(self):
+        self.close()
+
+
+class Ensemble1ParamsWidget(PamhyrWidget):
+    _pamhyr_ui = "Ensemble1ParamsWidget"
+    _pamhyr_name = "Parameters"
+
+    def __init__(self, ensemble=None,
+                 distribution=None,
+                 trad=None, parent=None):
+        super(Ensemble1ParamsWidget, self).__init__(
+            parent=parent
+        )
+        self._trad = trad
+
+        self._ensemble = ensemble
+        self._distribution = distribution
+        self._labels = distribution.labels
+
+        self._init_default_labels()
+        self._init_default_values()
+
+    def _init_default_labels(self):
+        self.set_label_text("label_0", self._trad[self._labels[0]])
+
+    def _init_default_values(self):
+        self._values = self._ensemble.params
+        if len(self._values) != 1:
+            self._values = self._distribution.default_values.copy()
+
+        self.set_double_spin_box("doubleSpinBox_0", self._values[0])
+
+    @property
+    def values(self):
+        self._values = [
+            self.get_double_spin_box("doubleSpinBox_0"),
+        ]
+
+        return self._values
+
+
+class Ensemble2ParamsWidget(PamhyrWidget):
+    _pamhyr_ui = "Ensemble2ParamsWidget"
+    _pamhyr_name = "Parameters"
+
+    def __init__(self, ensemble=None,
+                 distribution=None,
+                 trad=None, parent=None):
+        super(Ensemble2ParamsWidget, self).__init__(
+            parent=parent
+        )
+        self._trad = trad
+
+        self._ensemble = ensemble
+        self._distribution = distribution
+        self._labels = distribution.labels
+
+        self._init_default_labels()
+        self._init_default_values()
+
+    def _init_default_labels(self):
+        self.set_label_text("label_0", self._trad[self._labels[0]])
+        self.set_label_text("label_1", self._trad[self._labels[1]])
+
+    def _init_default_values(self):
+        self._values = self._ensemble.params
+        if len(self._values) != 2:
+            self._values = self._distribution.default_values.copy()
+
+        self.set_double_spin_box("doubleSpinBox_0", self._values[0])
+        self.set_double_spin_box("doubleSpinBox_1", self._values[1])
+
+    @property
+    def values(self):
+        self._values = [
+            self.get_double_spin_box("doubleSpinBox_0"),
+            self.get_double_spin_box("doubleSpinBox_1")
+        ]
+
+        return self._values

src/View/Ensembles/Table.py

@@ -0,0 +1,268 @@
+# Table.py -- Pamhyr
+# Copyright (C) 2023-2026  INRAE
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# -*- coding: utf-8 -*-
+
+import logging
+import traceback
+
+from tools import trace, timer
+
+from PyQt5.QtCore import (
+    Qt, QVariant, QAbstractTableModel,
+    QCoreApplication, QModelIndex, pyqtSlot,
+    QRect,
+)
+
+from PyQt5.QtWidgets import (
+    QDialogButtonBox, QPushButton, QLineEdit,
+    QFileDialog, QTableView, QAbstractItemView,
+    QUndoStack, QShortcut, QAction, QItemDelegate,
+    QComboBox,
+)
+
+from View.Ensembles.UndoCommand import (
+    SetNameCommand, SetTypeCommand, SetDataCommand,
+    SetDistributionCommand,
+    AddCommand, DelCommand,
+)
+
+from View.Tools.PamhyrTable import PamhyrTableModel
+
+from View.Ensembles.Translate import *
+
+logger = logging.getLogger()
+
+_translate = QCoreApplication.translate
+
+
+class ComboBoxDelegate(QItemDelegate):
+    def __init__(self, data=None, study=None,
+                 mode="stricklers", trad=None, parent=None):
+        super(ComboBoxDelegate, self).__init__(parent)
+
+        self._data = data
+        self._study = study
+        self._trad = trad
+        self._mode = mode
+
+    def createEditor(self, parent, option, index):
+        self.editor = QComboBox(parent)
+
+        if self._mode == "data_type":
+            self.editor.addItems(
+                [
+                    self._trad["not_defined"],
+                    self._trad["strickler_minor"],
+                    self._trad["strickler_medium"],
+                ]
+            )
+        elif self._mode == "stricklers":
+            used = list(
+                map(
+                    lambda e: (e.data_type, e._target_data),
+                    self._data.lst
+                )
+            )
+            current = self._data.get(index.row())
+
+            self.editor.addItems(
+                [self._trad["not_defined"]] +
+                list(
+                    map(
+                        lambda s: str(s),
+                        filter(
+                            # Exclude target data already used for
+                            # this data type
+                            lambda s: (
+                                current.target_data == s or
+                                (current.data_type, s) not in used
+                            ),
+                            self._study.river.stricklers.stricklers
+                        )
+                    )
+                )
+            )
+        elif self._mode == "distribution":
+            self.editor.addItems(
+                [self._trad["not_defined"]] +
+                list(
+                    map(
+                        lambda f: f.name,
+                        self._study._ens_distributions.lst
+                    )
+                )
+            )
+
+        self.editor.setCurrentText(index.data(Qt.DisplayRole))
+        return self.editor
+
+    def setEditorData(self, editor, index):
+        value = index.data(Qt.DisplayRole)
+        self.editor.currentTextChanged.connect(self.currentItemChanged)
+
+    def setModelData(self, editor, model, index):
+        text = str(editor.currentText())
+
+        if self._mode == "data_type":
+            value = next(
+                filter(
+                    lambda x: self._trad[x] == text,
+                    ["strickler_minor", "strickler_medium"],
+                ),
+                ""
+            )
+        elif self._mode == "stricklers":
+            value = next(
+                filter(
+                    lambda s: str(s) == text,
+                    self._study.river.stricklers.stricklers
+                ),
+                None
+            )
+        elif self._mode == "distribution":
+            value = next(
+                filter(
+                    lambda f: f.name == text,
+                    self._study._ens_distributions.lst
+                ),
+                None
+            )
+        else:
+            value = text
+
+        model.setData(index, value)
+
+        editor.close()
+        editor.deleteLater()
+
+    def updateEditorGeometry(self, editor, option, index):
+        r = QRect(option.rect)
+        if self.editor.windowFlags() & Qt.Popup:
+            if editor.parent() is not None:
+                r.setTopLeft(self.editor.parent().mapToGlobal(r.topLeft()))
+        editor.setGeometry(r)
+
+    @pyqtSlot()
+    def currentItemChanged(self):
+        self.commitData.emit(self.sender())
+
+
+class EnsembleTableModel(PamhyrTableModel):
+    def _setup_lst(self):
+        self._lst = self._data
+        self._study = self._opt_data
+
+    def data(self, index, role):
+        if role != Qt.ItemDataRole.DisplayRole:
+            return QVariant()
+
+        row = index.row()
+        column = index.column()
+
+        if self._headers[column] == "name":
+            return self._lst.get(row).name
+        elif self._headers[column] == "type":
+            return self._trad[self._lst.get(row).data_type]
+        elif self._headers[column] == "target_data":
+            value = self._lst.get(row).target_data
+            if value is None:
+                return self._trad["not_defined"]
+            return str(value)
+        elif self._headers[column] == "distribution":
+            value = self._lst.get(row).distribution
+            if value is None:
+                return self._trad["not_defined"]
+            return value.name
+        elif self._headers[column] == "parameters":
+            value = self._lst.get(row).params
+            return str(value)
+
+        return QVariant()
+
+    def setData(self, index, value, role=Qt.EditRole):
+        if not index.isValid() or role != Qt.EditRole:
+            return False
+
+        if self.is_same_data(index, value):
+            return False
+
+        row = index.row()
+        column = index.column()
+
+        try:
+            if self._headers[column] == "name":
+                self._undo.push(
+                    SetNameCommand(
+                        self._lst, row, value
+                    )
+                )
+            elif self._headers[column] == "type":
+                self._undo.push(
+                    SetTypeCommand(
+                        self._lst, row, value
+                    )
+                )
+            elif self._headers[column] == "target_data":
+                self._undo.push(
+                    SetDataCommand(
+                        self._lst, row, value
+                    )
+                )
+            elif self._headers[column] == "distribution":
+                self._undo.push(
+                    SetDistributionCommand(
+                        self._lst, row, value
+                    )
+                )
+        except Exception as e:
+            logger.info(e)
+            logger.debug(traceback.format_exc())
+
+        self.dataChanged.emit(index, index)
+        return True
+
+    def add(self, row, parent=QModelIndex()):
+        self.beginInsertRows(parent, row, row - 1)
+
+        self._undo.push(
+            AddCommand(
+                self._lst, row,
+            )
+        )
+
+        self.endInsertRows()
+        self.layoutChanged.emit()
+
+    def delete(self, rows, parent=QModelIndex()):
+        self.beginRemoveRows(parent, rows[0], rows[-1])
+
+        self._undo.push(
+            DelCommand(
+                self._lst, rows
+            )
+        )
+
+        self.endRemoveRows()
+        self.layoutChanged.emit()
+
+    def undo(self):
+        self._undo.undo()
+        self.layoutChanged.emit()
+
+    def redo(self):
+        self._undo.redo()
+        self.layoutChanged.emit()

src/View/Ensembles/Translate.py

@@ -0,0 +1,50 @@
+# Translate.py -- Pamhyr
+# Copyright (C) 2023-2026  INRAE
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# -*- coding: utf-8 -*-
+
+from PyQt5.QtCore import QCoreApplication
+
+from View.Translate import MainTranslate
+
+_translate = QCoreApplication.translate
+
+
+class EnsemblesTranslate(MainTranslate):
+    def __init__(self):
+        super(EnsemblesTranslate, self).__init__()
+
+        self._dict["Ensembles"] = _translate(
+            "Ensembles", "Ensembles"
+        )
+
+        self._dict["ensemble"] = _translate(
+            "Ensembles", "Ensembles scenario"
+        )
+        self._dict["strickler_minor"] = _translate(
+            "Ensembles", "Stricklers minor"
+        )
+        self._dict["strickler_medium"] = _translate(
+            "Ensembles", "Stricklers medium"
+        )
+
+        self._sub_dict["table_headers"] = {
+            "name": self._dict["name"],
+            "type": _translate("Ensembles", "Type"),
+            "target_data": _translate("Ensembles", "Target data"),
+            "distribution": _translate("Ensembles", "Distribution"),
+            "parameters": _translate("Ensembles", "Parameters"),
+        }

src/View/Ensembles/UndoCommand.py

@@ -0,0 +1,178 @@
+# UndoCommand.py -- Pamhyr
+# Copyright (C) 2023-2026  INRAE
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# -*- coding: utf-8 -*-
+
+from copy import deepcopy
+from tools import trace, timer
+
+from PyQt5.QtWidgets import (
+    QMessageBox, QUndoCommand, QUndoStack,
+)
+
+from Model.Friction.Friction import Friction
+from Model.Friction.FrictionList import FrictionList
+
+
+class SetNameCommand(QUndoCommand):
+    def __init__(self, ensembles, index, new_value):
+        QUndoCommand.__init__(self)
+
+        self._ensembles = ensembles
+        self._index = index
+        self._old = self._ensembles.get(self._index).name
+        self._new = str(new_value)
+
+    def undo(self):
+        self._ensembles.get(self._index).name = self._old
+
+    def redo(self):
+        self._ensembles.get(self._index).name = self._new
+
+
+class SetTypeCommand(QUndoCommand):
+    def __init__(self, ensembles, index, new_value):
+        QUndoCommand.__init__(self)
+
+        self._ensembles = ensembles
+        self._index = index
+        self._old = self._ensembles.get(self._index)\
+                                   .data_type
+        self._new = new_value
+
+    def undo(self):
+        self._ensembles.get(self._index).data_type = self._old
+
+    def redo(self):
+        self._ensembles.get(self._index).data_type = self._new
+
+
+class SetDataCommand(QUndoCommand):
+    def __init__(self, ensembles, index, data):
+        QUndoCommand.__init__(self)
+
+        self._ensembles = ensembles
+        self._index = index
+        self._old = self._ensembles.get(self._index)\
+                                   .target_data
+        self._new = data
+
+    def undo(self):
+        self._ensembles.get(self._index).target_data = self._old
+
+    def redo(self):
+        self._ensembles.get(self._index).target_data = self._new
+
+
+class SetDistributionCommand(QUndoCommand):
+    def __init__(self, ensembles, index, distribution):
+        QUndoCommand.__init__(self)
+
+        self._ensembles = ensembles
+        self._index = index
+        self._old = self._ensembles.get(self._index).distribution
+        self._old_params = self._ensembles.get(self._index).params
+        self._new = distribution
+
+    def undo(self):
+        self._ensembles.get(self._index).distribution = self._old
+        self._ensembles.get(self._index).params = self._old_params
+
+    def redo(self):
+        self._ensembles.get(self._index).distribution = self._new
+        if self._new is not None:
+            self._ensembles.get(self._index).params = self._new.default_values
+
+
+class AddCommand(QUndoCommand):
+    def __init__(self, ensembles, index):
+        QUndoCommand.__init__(self)
+
+        self._ensembles = ensembles
+        self._index = index
+        self._new = None
+
+    def undo(self):
+        self._ensembles.delete_i([self._index])
+
+    def redo(self):
+        if self._new is None:
+            self._new = self._ensembles.new(self._index)
+        else:
+            self._ensembles.insert(self._index, self._new)
+
+
+class ImportCommand(QUndoCommand):
+    def __init__(self, ensembles, data, index):
+        QUndoCommand.__init__(self)
+
+        self._ensembles = ensembles
+        self._index = index
+        self._data = data
+        self._news = None
+
+    def undo(self):
+        for new in self._news:
+            new.set_as_deleted()
+
+    def redo(self):
+        if self._news is None:
+            self._news = list(
+                map(
+                    lambda d: self._ensembles.new_with_data(
+                        self._index, d
+                    ),
+                    self._data,
+                )
+            )
+        else:
+            for new in self._news:
+                new.set_as_not_deleted()
+
+
+class DelCommand(QUndoCommand):
+    def __init__(self, ensembles, rows):
+        QUndoCommand.__init__(self)
+
+        self._ensembles = ensembles
+        self._rows = rows
+
+        self._friction = []
+        for row in rows:
+            self._friction.append((row, self._ensembles.get(row)))
+        self._friction.sort()
+
+    def undo(self):
+        for row, el in self._friction:
+            self._ensembles.insert(row, el)
+
+    def redo(self):
+        self._ensembles.delete_i(self._rows)
+
+
+class SetAllCommand(QUndoCommand):
+    def __init__(self, ensemble, data):
+        QUndoCommand.__init__(self)
+
+        self._ensemble = ensemble
+        self._old = self._ensemble.get_data_dict()
+        self._new = data
+
+    def undo(self):
+        self._ensemble.set_data_dict(self._old)
+
+    def redo(self):
+        self._ensemble.set_data_dict(self._new)

src/View/Ensembles/Window.py

@@ -0,0 +1,280 @@
+# Window.py -- Pamhyr
+# Copyright (C) 2023-2026  INRAE
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# -*- coding: utf-8 -*-
+
+import logging
+import json
+
+from tools import trace, timer, logger_exception
+
+from View.Tools.PamhyrWindow import PamhyrWindow, PamhyrDialog
+
+from PyQt5.QtGui import (
+    QKeySequence,
+)
+
+from PyQt5 import QtWidgets
+from PyQt5.QtCore import (
+    Qt, QVariant, QAbstractTableModel,
+    QCoreApplication, QModelIndex, pyqtSlot,
+    QRect, QSettings,
+)
+
+from PyQt5.QtWidgets import (
+    QDialogButtonBox, QPushButton, QLineEdit,
+    QFileDialog, QTableView, QAbstractItemView,
+    QUndoStack, QShortcut, QAction, QItemDelegate,
+    QComboBox, QVBoxLayout, QHeaderView, QTabWidget,
+)
+
+from Modules import Modules
+
+from View.Ensembles.Edit.Window import EnsembleEditDialog
+from View.Ensembles.Table import (
+    EnsembleTableModel, ComboBoxDelegate
+)
+from View.Ensembles.Translate import EnsemblesTranslate
+from View.Ensembles.UndoCommand import SetAllCommand, ImportCommand
+
+logger = logging.getLogger()
+
+
+class EnsemblesWindow(PamhyrWindow):
+    _pamhyr_ui = "Ensembles"
+    _pamhyr_name = "Ensembles"
+
+    def __init__(self, ensembles=None,
+                 study=None, config=None,
+                 parent=None):
+        trad = EnsemblesTranslate()
+
+        self._ensembles = ensembles
+
+        name = (
+            trad[self._pamhyr_name] + " - " +
+            study.name
+        )
+
+        super(EnsemblesWindow, self).__init__(
+            title=name,
+            study=study,
+            config=config,
+            trad=trad,
+            parent=parent
+        )
+
+        self.setup_table()
+        self.setup_connections()
+
+    def setup_table_delegate(self):
+        self._delegate_stricklers = ComboBoxDelegate(
+            data=self._ensembles,
+            study=self._study,
+            mode="stricklers",
+            trad=self._trad,
+            parent=self
+        )
+
+        self._delegate_data_type = ComboBoxDelegate(
+            data=self._ensembles,
+            study=self._study,
+            mode="data_type",
+            trad=self._trad,
+            parent=self
+        )
+
+        self._delegate_distribution = ComboBoxDelegate(
+            data=self._ensembles,
+            study=self._study,
+            mode="distribution",
+            trad=self._trad,
+            parent=self
+        )
+
+        return {
+            "type": self._delegate_data_type,
+            "target_data": self._delegate_stricklers,
+            "distribution": self._delegate_distribution,
+        }
+
+    def setup_table(self):
+        self._table = {}
+
+        delegates = self.setup_table_delegate()
+
+        editable_headers = [
+            "name",
+        ]
+
+        table = self.find(QTableView, f"tableView")
+        self._table = EnsembleTableModel(
+            table_view=table,
+            table_headers=self._trad.get_dict("table_headers"),
+            editable_headers=editable_headers,
+            delegates=delegates,
+            data=self._ensembles,
+            trad=self._trad,
+            undo=self._undo_stack,
+            opt_data=self._study
+        )
+
+        table.setModel(self._table)
+        table.setSelectionBehavior(QAbstractItemView.SelectRows)
+        table.horizontalHeader().setSectionResizeMode(QHeaderView.Stretch)
+        table.setAlternatingRowColors(True)
+
+    def setup_connections(self):
+        self.find(QAction, "action_add").triggered.connect(self.add)
+        self.find(QAction, "action_del").triggered.connect(self.delete)
+        self.find(QAction, "action_edit").triggered.connect(self.edit)
+        self.find(QAction, "action_export").triggered.connect(
+            self.export_to_json
+        )
+        self.find(QAction, "action_import").triggered.connect(
+            self.import_from_json
+        )
+
+        table = self.find(QTableView, f"tableView")
+        table.selectionModel()\
+             .selectionChanged\
+             .connect(self.update)
+
+        self._table.dataChanged\
+                   .connect(self.update)
+
+    def index_selected_rows(self):
+        table = self.find(QTableView, f"tableView")
+        return list(
+            # Delete duplicate
+            set(
+                map(
+                    lambda i: i.row(),
+                    table.selectedIndexes()
+                )
+            )
+        )
+
+    def add(self):
+        rows = self.index_selected_rows()
+        if len(self._ensembles) == 0 or len(rows) == 0:
+            self._table.add(0)
+        else:
+            self._table.add(rows[0])
+
+    def delete(self):
+        rows = self.index_selected_rows()
+        if len(rows) == 0:
+            return
+
+        self._table.delete(rows)
+
+    def _undo(self):
+        self._table.undo()
+
+    def _redo(self):
+        self._table.redo()
+
+    def edit(self):
+        rows = self.index_selected_rows()
+
+        for row in rows:
+            try:
+                ens = self._ensembles.get(row)
+                dlg = EnsembleEditDialog(
+                    study=self._study,
+                    ensemble=ens,
+                    parent=self
+                )
+
+                if dlg.exec():
+                    self._undo_stack.push(
+                        SetAllCommand(
+                            ens, dlg.values
+                        )
+                    )
+            except Exception as e:
+                logger_exception(e)
+                return
+
+    def export_to_json(self):
+        ens = []
+        for e in self._ensembles.lst:
+            ens.append(e.get_data_dict(use_ids=True))
+
+        data = {"ensembles": ens}
+
+        def aux(filename):
+            with open(filename[0], 'w') as f:
+                f.write(json.dumps(data))
+
+        self.file_dialog(
+            select_file=None,
+            callback=aux,
+            default_suffix='.json',
+            file_filter=[self._trad["file_json"]]
+        )
+
+    def import_from_json(self):
+        def aux(filename):
+            with open(filename[0], 'r') as f:
+                return json.load(f)
+
+        data = self.file_dialog(
+            select_file=None,
+            callback=aux,
+            default_suffix='.json',
+            file_filter=[self._trad["file_json"]]
+        )
+
+        dtarget = dict(
+            map(
+                lambda s: (s.pamhyr_id, s),
+                self._study.river.stricklers.stricklers
+            )
+        )
+
+        ddistr = dict(
+            map(
+                lambda d: (d.name, d),
+                self._study._ens_distributions.lst
+            )
+        )
+
+        def update(d, values):
+            d.update(values)
+            return d
+
+        updated = list(
+            map(
+                lambda d: update(
+                    d, {"target_data": dtarget[d["target_data"]]}
+                ),
+                map(
+                    lambda d: update(
+                        d, {"distribution": ddistr[d["distribution"]]}
+                    ),
+                    data["ensembles"]
+                )
+            )
+        )
+
+        self._undo_stack.push(
+            ImportCommand(
+                self._ensembles, updated, 0
+            )
+        )
+        self._table.update()

src/View/MainWindow.py

@@ -67,6 +67,7 @@ from View.Configure.Window import ConfigureWindow
 from View.Study.Window import NewStudyWindow
 from View.About.Window import AboutWindow
 from View.Scenarios.Window import ScenariosWindow
+from View.Ensembles.Window import EnsemblesWindow
 from View.Network.Window import NetworkWindow
 from View.Geometry.Window import GeometryWindow
 from View.BoundaryCondition.Window import BoundaryConditionWindow
@@ -83,11 +84,14 @@ from View.GeoTIFF.Window import GeoTIFFListWindow
 from View.REPLines.Window import REPLineListWindow
 from View.SolverParameters.Window import SolverParametersWindow
 from View.RunSolver.Window import (
+    EnsembleRunNumberDialog,
     SelectSolverWindow,
     SolverLogWindow,
+    SolverLogEnsWindow,
 )
 
-from View.Results.Window import ResultsWindow
+
+from View.Results.Window import ResultsWindow, ResultsEnsembleWindow
 from View.Results.CompareDialog import (
     CompareScenariosWindow
 )
@@ -1339,6 +1343,7 @@ class ApplicationWindow(QMainWindow, ListedSubWindow, WindowToolKit):
         """
         if self._study is None:
             return
+
         if self._study.filename is None or self._study.filename == "":
             self.message_box(
                 window_title=self._trad["Warning"],
@@ -1372,6 +1377,29 @@ class ApplicationWindow(QMainWindow, ListedSubWindow, WindowToolKit):
             self.scenarios = ScenariosWindow(study=self._study, parent=self)
             self.scenarios.show()
 
+    def open_ensemble_scenario(self):
+        """Open ensemble scenario window
+
+        Returns:
+            Nothing
+        """
+        if self._study is None:
+            return
+
+        if self.sub_window_exists(
+            EnsemblesWindow,
+            data=[self._study, self.conf]
+        ):
+            return
+
+        ensemble = EnsemblesWindow(
+            ensembles=self._study.river._ensembles,
+            study=self._study,
+            config=self.conf,
+            parent=self
+        )
+        ensemble.show()
+
     def open_geometry(self):
         """Open geometry window
 
@@ -1728,6 +1756,9 @@ class ApplicationWindow(QMainWindow, ListedSubWindow, WindowToolKit):
         sol.show()
 
     def solver_log(self, solver):
+        if self._study.status.scenario.is_ensemble():
+            return self._solver_log_ensemble(solver)
+
         sol = SolverLogWindow(
             study=self._study,
             config=self.conf,
@@ -1736,6 +1767,28 @@ class ApplicationWindow(QMainWindow, ListedSubWindow, WindowToolKit):
         )
         sol.show()
 
+    def _solver_log_ensemble(self, solver):
+        run_number = 1
+
+        dlg = EnsembleRunNumberDialog(
+            trad=self._trad,
+            parent=self
+        )
+        if dlg.exec():
+            function = dlg.function
+            number_of_run = dlg.number
+            seed = dlg.seed
+
+            sol = SolverLogEnsWindow(
+                number_of_run=number_of_run,
+                seed=seed, function=function,
+                study=self._study,
+                config=self.conf,
+                solver=solver,
+                parent=self
+            )
+            sol.show()
+
     def msg_box_results_continue(self):
         dlg = QMessageBox(self)
 
@@ -1812,6 +1865,12 @@ class ApplicationWindow(QMainWindow, ListedSubWindow, WindowToolKit):
             if not self.msg_box_results_continue():
                 return
 
+        if self._study.status.scenario.is_ensemble():
+            self.open_solver_ens_results_window(solver, results)
+        else:
+            self.open_solver_results_window(solver, results)
+
+    def open_solver_results_window(self, solver, results):
         # Windows already opened
         if self.sub_window_exists(
                 ResultsWindow,
@@ -1831,6 +1890,26 @@ class ApplicationWindow(QMainWindow, ListedSubWindow, WindowToolKit):
         )
         res.show()
 
+    def open_solver_ens_results_window(self, solver, results):
+        # Windows already opened
+        if self.sub_window_exists(
+                ResultsEnsembleWindow,
+                data=[
+                    self._study,
+                    None,      # No config,
+                    results._solver,
+                    results._repertory,
+                    results._name]
+        ):
+            return
+
+        res = ResultsEnsembleWindow(
+            study=self._study,
+            results=[results],
+            parent=self
+        )
+        res.show()
+
     def msg_open_results_no_results(self):
         self.message_box(
             window_title=self._trad["Warning"],

src/View/Results/CustomExport/CustomExport.py

@@ -26,10 +26,13 @@ from View.Results.translate import ResultsTranslate
 
 
 class CustomExportDialog(PamhyrDialog):
-    _pamhyr_ui = "CustomExportAdisDialog"
+    _pamhyr_ui = "CustomExportDialog"
-    _pamhyr_name = "Custom Plot Selection"
+    _pamhyr_name = "Custom Export"
 
-    def __init__(self, parent=None):
+    def __init__(self,
+                 tag_x="values_x",
+                 tag_y="values_y",
+                 parent=None):
         trad = ResultsTranslate()
         super(CustomExportDialog, self).__init__(
             title=trad[self._pamhyr_name],
@@ -38,8 +41,8 @@ class CustomExportDialog(PamhyrDialog):
             parent=parent
         )
 
-        self._available_values_x = self._trad.get_dict("values_x")
+        self._available_values_x = self._trad.get_dict(tag_x)
-        self._available_values_y = self._trad.get_dict("values_y")
+        self._available_values_y = self._trad.get_dict(tag_y)
 
         self.setup_radio_buttons_x()
         self.setup_radio_buttons_res()
@@ -66,8 +69,8 @@ class CustomExportDialog(PamhyrDialog):
 
     def setup_radio_buttons_res(self):
         self._radio2 = []
-        layout = self.find(QVBoxLayout, "verticalLayout_pol")
+        layout = self.find(QVBoxLayout, "verticalLayout_solv")
-        label = self.find(QLabel, "label_3")
+        label = self.find(QLabel, "label_solv")
         label.setText(self._trad["solver"])
 
         for solver in self.parent._solvers:
@@ -89,7 +92,7 @@ class CustomExportDialog(PamhyrDialog):
         layout.addStretch()
 
     def setup_label(self):
-        self._label = self.find(QLabel, "label_4")
+        self._label = self.find(QLabel, "label_data")
         self._label.setFrameStyle(QFrame.StyledPanel)
         self._label.setStyleSheet('background-color: white')
         self.set_label()
@@ -163,6 +166,15 @@ class CustomExportDialog(PamhyrDialog):
                 res = i
                 break
 
-        self.value = x, y, self._envelop.isChecked(), res
+        self.value = (x, y, self._envelop.isChecked(), res)
 
         super().accept()
+
+
+class CustomExportEnsembleDialog(CustomExportDialog):
+    def __init__(self, parent=None):
+        super(CustomExportEnsembleDialog, self).__init__(
+            tag_x="values_x_ens",
+            tag_y="values_y_ens",
+            parent=parent
+        )

src/View/Results/PlotHEnsemble.py

@@ -0,0 +1,261 @@
+# PlotHEnsemble.py -- Pamhyr
+# Copyright (C) 2023-2026  INRAE
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# -*- coding: utf-8 -*-
+
+import logging
+
+from functools import reduce
+from datetime import datetime
+
+from tools import timer, trace, logger_exception
+from View.Tools.PamhyrPlot import PamhyrPlot
+
+from PyQt5.QtCore import (
+    QCoreApplication
+)
+
+_translate = QCoreApplication.translate
+
+logger = logging.getLogger()
+
+
+class PlotHEnsemble(PamhyrPlot):
+    def __init__(self, canvas=None, trad=None, toolbar=None,
+                 results=None, reach_id=0, profile_id=[0], res_id=[0],
+                 parent=None):
+        super(PlotHEnsemble, self).__init__(
+            canvas=canvas,
+            trad=trad,
+            data=results,
+            toolbar=toolbar,
+            parent=parent
+        )
+
+        self._mode = "time"
+
+        self._parent = parent
+        self._current_reach_id = reach_id
+        self._current_profile_id = profile_id
+        self._current_res_id = res_id
+        self._timestamps = parent._timestamps
+        self._current_timestamp = max(self._timestamps)
+
+        self.label_x = self._trad["unit_time_s"]
+        self.label_y = self._trad["unit_discharge"]
+
+        self.label_discharge = _translate("Results", "Cross-section discharge")
+        self.label_discharge_max = _translate("Results", "Max discharge")
+        self.label_timestamp = _translate("Results", "Current timestamp")
+
+        self._isometric_axis = False
+
+        # self._auto_relim_update = False
+        # self._autoscale_update = False
+
+        self._line_max = []
+        self._line = []
+        self._add_data_lines = []
+
+    @property
+    def results(self):
+        return self.data
+
+    @results.setter
+    def results(self, results):
+        self.data = results
+        self._current_timestamp = max(self._timestamps)
+
+    @timer
+    def draw(self, highlight=None):
+        self.canvas.axes.cla()
+        self.canvas.axes.grid(color='grey', linestyle='--', linewidth=0.5)
+
+        if self.results is None:
+            return
+
+        if len(self._current_res_id) < 1:
+            return
+
+        for res_id in self._current_res_id:
+            if self.results[res_id] is None:
+                continue
+
+            results = self.results[res_id]
+            reach = results.river.reach(self._current_reach_id)
+
+            if reach.geometry.number_profiles == 0:
+                self._init = False
+                return
+
+            self.draw_data(res_id)
+            self.draw_data_std_derivation(res_id)
+
+        self.canvas.axes.set_xlabel(
+            self._trad["unit_time_s"],
+            color='black', fontsize=10
+        )
+
+        self.canvas.axes.set_ylabel(
+            self._trad["unit_discharge"],
+            color='black', fontsize=10
+        )
+
+        self.set_ticks_time_formater()
+
+        self.draw_additional_data(0)
+
+        self.enable_legend()
+
+        self.canvas.draw_idle()
+        self.update_idle()
+
+        self.draw_current()
+        self._init = True
+
+    @timer
+    def draw_data(self, res_id):
+        results = self.results[res_id]
+        reach = results.river.reach(self._current_reach_id)
+
+        colors = [
+            ("q_min", self.color_plot_ensemble_min),
+            ("q_mean", self.color_plot_ensemble_mean),
+            ("q_max", self.color_plot_ensemble_max),
+        ]
+
+        for t, c in colors:
+            q = results.get("table")[t]
+            profile = reach.profile(self._current_profile_id[0])
+
+            x = self._timestamps
+            y = q[:, profile.global_index]
+            # y = profile.get_key("Q")
+
+            if res_id == 2:
+                label = f"Δ {self.label_discharge} {t} {profile.name}"
+            else:
+                label = f"{self.label_discharge} {t} {profile.name}"
+
+            line, = self.canvas.axes.plot(
+                x, y,
+                label=label,
+                color=c,
+                # linestyle=self.linestyle[i % len(self.linestyle)],
+                **self.plot_default_kargs
+            )
+
+            self._line.append(line)
+
+    @timer
+    def draw_data_std_derivation(self, res_id):
+        results = self.results[res_id]
+        reach = results.river.reach(self._current_reach_id)
+
+        q = results.get("table")["q_mean"]
+        std_deriv = results.get("table")["q_std_derivation"]
+        profile = reach.profile(self._current_profile_id[0])
+
+        x = self._timestamps
+        y = q[:, profile.global_index]
+        std = std_deriv[:, profile.global_index]
+
+        y_b = y - std
+        y_t = y + std
+
+        plot = self.canvas.axes.fill_between(
+            x, y_b, y_t,
+            label=f"Standard derivation {profile.name}",
+            color=self.color_plot_ensemble_std_deriv,
+            alpha=0.3,
+        )
+
+    def draw_additional_data(self, res_id):
+        results = self.results[res_id]
+
+        self._add_data_lines = []
+
+        for data in results.get("additional_data"):
+            data = data._data
+            x, y = data['x'], data['y']
+            legend = data['legend']
+            unit = data['unit']
+
+            if data['type_x'] == 'time' and data['type_y'] == 'discharge':
+                line, = self.canvas.axes.plot(
+                    x, y, marker="+",
+                    label=legend + ' ' + unit
+                )
+
+                self._add_data_lines.append(line)
+
+        self.enable_legend()
+        self.canvas.draw_idle()
+
+    def draw_current(self):
+        self._current, = self.canvas.axes.plot(
+            [self._current_timestamp, self._current_timestamp],
+            self.canvas.axes.get_ylim(),
+            # label=self.label_timestamp,
+            color="grey",
+            linestyle="dashed",
+            lw=1.,
+        )
+
+    def set_reach(self, reach_id):
+        self._current_reach_id = reach_id
+        self._current_profile_id = [0]
+        self.draw()
+
+    def set_profile(self, profile_id):
+        self._current_profile_id = profile_id
+        # self.update()
+        self.draw()
+
+    def set_result(self, res_id):
+        self._current_res_id = res_id
+        self.draw()
+
+    def set_timestamp(self, timestamp):
+        self._current_timestamp = timestamp
+        self.update_current()
+        self.update_idle()
+
+    def update(self):
+        if not self._init:
+            self.draw()
+
+        self.update_current()
+        self.update_idle()
+
+    def update_additional_data(self):
+        self.draw_additional_data(0)
+        self.update_idle()
+
+    def update_all(self):
+        self._current_reach_id = self._parent._get_current_reach()
+        self._current_profile_id = self._parent._get_current_profiles_list()
+        self._current_res_id = self._parent._get_current_results()
+        self._current_timestamp = self._parent._get_current_timestamp()
+        self._init = False
+        self.update()
+
+    def update_current(self):
+        y = self._current.get_ydata()
+        self._current.set_data(
+            [self._current_timestamp, self._current_timestamp],
+            y
+        )

src/View/Results/PlotRKC.py

@@ -124,12 +124,8 @@ class PlotRKC(PamhyrPlot):
         table = results.get("table")["zfd"]
         ts = results.get_timestamp_id(self._current_timestamp)
 
-        zfd = list(
+        gi_0, gi_1 = reach.global_index
-            map(
+        zfd = table[ts, gi_0:gi_1 + 1]
-                lambda p: table[ts, p.global_index],
-                reach.profiles
-            )
-        )
 
         self.line_bottom, = self.canvas.axes.plot(
             rk, zfd,
@@ -189,14 +185,8 @@ class PlotRKC(PamhyrPlot):
             table = result.get("table")["Z"]
             ts = result.get_timestamp_id(self._current_timestamp)
 
-            water_z = list(
+            gi_0, gi_1 = reach.global_index
-                map(
+            water_z = table[ts, gi_0:gi_1 + 1]
-                    lambda p: table[
-                        ts, p.global_index
-                    ],
-                    reach.profiles
-                )
-            )
 
             self.water = self.canvas.axes.plot(
                 rk, water_z,
@@ -219,16 +209,8 @@ class PlotRKC(PamhyrPlot):
             table = result.get("table")["Z"]
             ts = result.get_timestamp_id(self._current_timestamp)
 
-            water_z = list(
+            gi_0, gi_1 = reach.global_index
-                map(
+            water_z = table[ts, gi_0:gi_1 + 1]
-                    lambda p: np.max(
-                        table[
-                            :, p.global_index
-                        ]
-                    ),
-                    reach.profiles
-                )
-            )
 
             self.canvas.axes.plot(
                 rk, water_z, lw=1.,
@@ -361,14 +343,8 @@ class PlotRKC(PamhyrPlot):
         table = result.get("table")["Z"]
         ts = result.get_timestamp_id(self._current_timestamp)
 
-        water_z = list(
+        gi_0, gi_1 = reach.global_index
-            map(
+        water_z = table[ts, gi_0:gi_1 + 1]
-                lambda p: table[
-                    ts, p.global_index
-                ],
-                reach.profiles
-            )
-        )
 
         self.water[0].set_data(
             rk, water_z
@@ -411,10 +387,8 @@ class PlotRKC(PamhyrPlot):
         table = results.get("table")["zfd"]
         ts = results.get_timestamp_id(self._current_timestamp)
 
-        zfd = list(map(
+        gi_0, gi_1 = reach.global_index
-            lambda p: table[ts, p.global_index],
+        zfd = table[ts, gi_0:gi_1 + 1]
-            reach.profiles
-        ))
 
         self.line_bottom.remove()
 

src/View/Results/PlotRKCEnsemble.py

@@ -0,0 +1,355 @@
+# PlotRKCEnsemble.py -- Pamhyr
+# Copyright (C) 2023-2026  INRAE
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# -*- coding: utf-8 -*-
+
+import logging
+import numpy as np
+
+from functools import reduce
+
+from tools import timer
+from View.Tools.PamhyrPlot import PamhyrPlot
+
+from PyQt5.QtCore import (
+    QCoreApplication
+)
+
+logger = logging.getLogger()
+
+
+class PlotRKCEnsemble(PamhyrPlot):
+    def __init__(self, canvas=None, trad=None, toolbar=None,
+                 results=None, reach_id=0, profile_id=0,
+                 parent=None):
+        super(PlotRKCEnsemble, self).__init__(
+            canvas=canvas,
+            trad=trad,
+            data=results,
+            toolbar=toolbar,
+            parent=parent
+        )
+
+        self._parent = parent
+        self._current_reach_id = reach_id
+        self._current_profile_id = profile_id
+        self._timestamps = parent._timestamps
+        self._current_timestamp = max(self._timestamps)
+
+        self.label_x = self._trad["unit_rk"]
+        self.label_y = self._trad["unit_elevation"]
+
+        self.label_bottom = self._trad["label_bottom"]
+        self.label_water = self._trad["label_water"]
+        self.label_water_mean = self._trad["label_water_mean"]
+        self.label_water_min = self._trad["label_water_min"]
+        self.label_water_max = self._trad["label_water_max"]
+
+        self.water = []
+
+        self._isometric_axis = False
+
+        self._auto_relim_update = True
+        self._autoscale_update = False
+
+    @property
+    def results(self):
+        return self.data
+
+    @results.setter
+    def results(self, results):
+        self.data = results
+        self._current_timestamp = max(self._timestamps)
+
+    @timer
+    def draw(self, highlight=None):
+        self.init_axes()
+
+        if self.results is None:
+            return
+
+        if self.results[0] is None:
+            return
+
+        results = self.results[0]
+        reach = results.river.reach(self._current_reach_id)
+
+        self.draw_bottom(reach)
+        self.draw_std_derivation(reach)
+        self.draw_water_elevation(reach)
+        self.draw_current(reach)
+        self.draw_profiles_hs(reach)
+
+        self.enable_legend()
+
+        self.idle()
+        self._init = True
+
+    def draw_bottom(self, reach):
+        self.draw_bottom_geometry(reach)
+
+    def draw_profiles_hs(self, reach):
+        results = self.results[0]
+        lhs = filter(
+            lambda hs: hs._input_reach.reach is reach.geometry,
+            filter(
+                lambda hs: hs._input_reach is not None,
+                results.study.river.hydraulic_structures.lst
+            )
+        )
+
+        for hs in lhs:
+            x = hs.input_section.rk
+            z_min = reach.geometry.get_z_min()
+            z_max = reach.geometry.get_z_max()
+
+            self.canvas.axes.plot(
+                [x, x],
+                [min(z_min), max(z_max)],
+                linestyle="--",
+                lw=1.,
+                color=self.color_plot_previous,
+            )
+
+            self.canvas.axes.annotate(
+                " > " + hs.name,
+                (x, max(z_max)),
+                horizontalalignment='left',
+                verticalalignment='top',
+                annotation_clip=True,
+                fontsize=9, color=self.color_plot_previous,
+            )
+
+    def draw_bottom_geometry(self, reach):
+        rk = reach.geometry.get_rk()
+        z_min = reach.geometry.get_z_min()
+        z_max = reach.geometry.get_z_max()
+
+        self.line_rk_zmin = self.canvas.axes.plot(
+            rk, z_min,
+            color=self.color_plot_river_bottom,
+            lw=1.
+        )
+
+        self._river_bottom = z_min
+
+    def draw_water_elevation(self, reach):
+        if len(reach.geometry.profiles) != 0:
+            result = self.results[0]
+            rk = reach.geometry.get_rk()
+
+            self.water = []
+
+            colors = [
+                ("z_min", self.color_plot_ensemble_min),
+                ("z_mean", self.color_plot_ensemble_mean),
+                ("z_max", self.color_plot_ensemble_max),
+            ]
+
+            for t, color in colors:
+                table = result.get("table")[t]
+                ts = result.get_timestamp_id(self._current_timestamp)
+
+                gi_0, gi_1 = reach.global_index
+                water_z = table[ts, gi_0:gi_1 + 1]
+
+                plot, = self.canvas.axes.plot(
+                    rk, water_z,
+                    lw=1., color=color,
+                    label=f"Elevation: {t} (m)",
+                )
+
+                self.water.append(plot)
+
+    def draw_std_derivation(self, reach):
+        if len(reach.geometry.profiles) != 0:
+            result = self.results[0]
+            rk = reach.geometry.get_rk()
+            z_min = reach.geometry.get_z_min()
+
+            color = self.color_plot_ensemble_std_deriv
+
+            table = result.get("table")["z_mean"]
+            std_deriv = result.get("table")["z_std_derivation"]
+
+            ts = result.get_timestamp_id(self._current_timestamp)
+
+            gi_0, gi_1 = reach.global_index
+
+            water_z = table[ts, gi_0:gi_1 + 1]
+            std = std_deriv[ts, gi_0:gi_1 + 1]
+
+            water_z_b = water_z - std
+            water_z_t = water_z + std
+
+            plot = self.canvas.axes.fill_between(
+                rk, water_z_b, water_z_t,
+                lw=1., color=color, alpha=0.3,
+                label=f"Standard derivation",
+            )
+
+            self.water_std_deriv = plot
+
+    def draw_additional_data(self):
+        results = self.results[0]
+
+        self._add_data_lines = []
+
+        for data in results.get("additional_data"):
+            data = data._data
+
+            tx, ty = data['type_x'], data['type_y']
+            x, y = data['x'], data['y']
+            legend = data['legend']
+            unit = data['unit']
+
+            if tx == 'water_elevation' and ty == 'time':
+                line, = self.canvas.axes.plot(
+                    x, y, marker="+",
+                    label=legend + ' ' + unit
+                )
+
+                self._add_data_lines.append(line)
+
+        self.canvas.draw_idle()
+
+    def draw_current(self, reach):
+        rk = reach.geometry.get_rk()
+        z_min = reach.geometry.get_z_min()
+        z_max = reach.geometry.get_z_max()
+
+        self.profile, = self.canvas.axes.plot(
+            [
+                rk[self._current_profile_id],
+                rk[self._current_profile_id]
+            ],
+            [
+                z_max[self._current_profile_id],
+                z_min[self._current_profile_id]
+            ],
+            color=self.color_plot,
+            lw=1.
+        )
+
+    def is_overflow_point(self, profile, point):
+        left_limit = profile.geometry.point(0)
+        right_limit = profile.geometry.point(
+            profile.geometry.number_points - 1
+        )
+
+        return (
+            point == left_limit
+            or point == right_limit
+        )
+
+    def set_reach(self, reach_id):
+        self._current_reach_id = reach_id
+        self._current_profile_id = 0
+        self.draw()
+
+    def set_profile(self, profile_id):
+        self._current_profile_id = profile_id
+        self.update_current()
+
+    def set_timestamp(self, timestamp):
+        self._current_timestamp = timestamp
+        self.update()
+
+    def update(self):
+        if not self._init:
+            self.draw()
+
+        results = self.results[0]
+        reach = results.river.reach(self._current_reach_id)
+
+        self.update_water_elevation()
+        self.update_std_derivation()
+
+        self.update_idle()
+
+    def update_all(self):
+        self._current_reach_id = self._parent._get_current_reach()
+        self._current_profile_id = self._parent._get_current_profile()
+        self._current_timestamp = self._parent._get_current_timestamp()
+        self._init = False
+        self.update()
+
+    def update_water_elevation(self):
+        result = self.results[0]
+        reach = result.river.reach(self._current_reach_id)
+        rk = reach.geometry.get_rk()
+        z_min = reach.geometry.get_z_min()
+        table = result.get("table")["z_mean"]
+        ts = result.get_timestamp_id(self._current_timestamp)
+
+        gi_0, gi_1 = reach.global_index
+        water_z = table[ts, gi_0:gi_1 + 1]
+
+        colors = [
+            (0, "z_min", self.color_plot_ensemble_min),
+            (1, "z_mean", self.color_plot_ensemble_mean),
+            (2, "z_max", self.color_plot_ensemble_max),
+        ]
+
+        for i, t, color in colors:
+            table = result.get("table")[t]
+            ts = result.get_timestamp_id(self._current_timestamp)
+
+            gi_0, gi_1 = reach.global_index
+            water_z = table[ts, gi_0:gi_1 + 1]
+
+            self.water[i].set_data(rk, water_z)
+
+    def update_std_derivation(self):
+        result = self.results[0]
+        reach = result.river.reach(self._current_reach_id)
+
+        rk = reach.geometry.get_rk()
+
+        table = result.get("table")["z_mean"]
+        std_deriv = result.get("table")["z_std_derivation"]
+
+        ts = result.get_timestamp_id(self._current_timestamp)
+
+        gi_0, gi_1 = reach.global_index
+
+        water_z = table[ts, gi_0:gi_1 + 1]
+        std = std_deriv[ts, gi_0:gi_1 + 1]
+
+        water_z_b = water_z - std
+        water_z_t = water_z + std
+
+        self.water_std_deriv.set_data(rk, water_z_b, water_z_t)
+
+    def update_additional_data(self):
+        self.draw_additional_data()
+        self.update_idle()
+
+    def update_current(self):
+        results = self.results[0]
+        reach = results.river.reach(self._current_reach_id)
+        rk = reach.geometry.get_rk()
+        z_min = reach.geometry.get_z_min()
+        z_max = reach.geometry.get_z_max()
+        cid = self._current_profile_id
+
+        self.profile.set_data(
+            [rk[cid], rk[cid]],
+            [z_max[cid], z_min[cid]]
+        )
+
+        self.canvas.figure.canvas.draw_idle()
+        self.update_idle()

src/View/Results/Table.py

@@ -61,6 +61,8 @@ class TableModel(PamhyrTableModel):
             #                        _river.reach(0).profiles))
         elif self._opt_data == "solver":
             self._lst = self._parent._solvers
+        elif self._opt_data == "runs":
+            self._lst = self._data[0].get("table")["samples"]
 
     def __init__(self, **kwargs):
         self._timestamp = max(kwargs["parent"]._timestamps)
@@ -93,6 +95,10 @@ class TableModel(PamhyrTableModel):
                 if v is None:
                     v = self._data[0].solver_name
                 return str(v)
+        elif self._opt_data == "runs":
+            if self._headers[column] == "runs":
+                p = self._lst[row, :]
+                return f"{row}: {p}"
         elif self._opt_data == "raw_data":
             table = self._data[0].get("table")
             ts = self._data[0].get_timestamp_id(self._timestamp)

src/View/Results/translate.py

@@ -44,6 +44,7 @@ class ResultsTranslate(MainTranslate):
 
         self._dict['envelop'] = _translate("Results", "Envelop")
         self._dict['solver'] = _translate("Results", "Solver")
+        self._dict['runs'] = _translate("Results", "Runs")
 
         self._dict['x'] = _translate("Results", "X (m)")
         self._dict["temperature_map"] = _translate(
@@ -55,10 +56,20 @@ class ResultsTranslate(MainTranslate):
 
         self._dict['label_bottom'] = _translate("Results", "Bottom")
         self._dict['label_water'] = _translate("Results", "Water elevation")
+
+        self._dict['label_water_min'] = _translate(
+            "Results",
+            "Min water elevation"
+        )
+        self._dict['label_water_mean'] = _translate(
+            "Results",
+            "Mean water elevation"
+        )
         self._dict['label_water_max'] = _translate(
             "Results",
             "Max water elevation"
         )
+
         self._dict["ImageCoordinates"] = _translate(
             "Results", "Image coordinates"
         )
@@ -87,6 +98,10 @@ class ResultsTranslate(MainTranslate):
             "solver": self._dict['solver'],
         }
 
+        self._sub_dict["table_headers_runs"] = {
+            "runs": self._dict['runs'],
+        }
+
         self._sub_dict["table_headers_pollutants"] = {
             "name": _translate("Results", "Pollutant name"),
         }
@@ -121,6 +136,25 @@ class ResultsTranslate(MainTranslate):
             "wet_area": self._dict["unit_wet_area"],
         }
 
+        self._sub_dict["values_x_ens"] = {
+            "rk": self._dict["unit_rk"],
+            "time": self._dict["unit_time_s"],
+        }
+
+        self._sub_dict["values_y_ens"] = {
+            "z_mean": self._dict["unit_mean_water_elevation"],
+            "q_mean": self._dict["unit_mean_discharge"],
+            "z_standard_derivation": self._dict["unit_std_deriv_elevation"],
+            "q_standard_derivation": self._dict["unit_std_deriv_discharge"],
+        }
+
+        self._sub_dict["values_y_envelop_ens"] = {
+            "z_min": self._dict["unit_min_water_elevation"],
+            "z_max": self._dict["unit_max_water_elevation"],
+            "q_min": self._dict["unit_min_discharge"],
+            "q_max": self._dict["unit_max_discharge"],
+        }
+
         if self.pollutants is not None:
             self._sub_dict["table_headers_raw_data"] = {
                 "name": _translate("Results", "Profile"),
@@ -151,7 +185,7 @@ class ResultsTranslate(MainTranslate):
             "max_velocity": self._dict["unit_max_velocity"],
             "min_depth": self._dict["unit_min_depth"],
             "max_depth": self._dict["unit_max_depth"],
-            }
+        }
 
         self._sub_dict["values_y_pol"] = {
             "unit_C": self._dict["unit_concentration"],

src/View/RunSolver/Window.py

@@ -20,6 +20,8 @@ import os
 import logging
 import tempfile
 
+import numpy as np
+
 from queue import Queue
 from tools import trace, timer, logger_exception
 
@@ -40,7 +42,7 @@ from PyQt5.QtWidgets import (
     QFileDialog, QTableView, QAbstractItemView,
     QUndoStack, QShortcut, QAction, QItemDelegate,
     QComboBox, QVBoxLayout, QHeaderView, QTabWidget,
-    QTextEdit,
+    QTextEdit, QProgressBar, QCheckBox,
 )
 
 from View.RunSolver.Log.Window import SolverLogFileWindow
@@ -57,6 +59,63 @@ _translate = QCoreApplication.translate
 logger = logging.getLogger()
 
 
+class EnsembleRunNumberDialog(PamhyrDialog):
+    _pamhyr_ui = "EnsembleRunNumberDialog"
+    _pamhyr_name = "EnsembleRunNumber"
+
+    def __init__(self, trad=None, parent=None):
+        super(EnsembleRunNumberDialog, self).__init__(
+            title=trad[self._pamhyr_name],
+            trad=trad,
+            options=[],
+            parent=parent
+        )
+
+        self._function = "Random"
+        self._number = 100
+        self._seed = -1
+
+        self._init_default_values()
+        self._init_connection()
+
+    def _init_default_values(self):
+        self.combobox_add_items("comboBox", ["Random"])
+        self.set_combobox_text("comboBox", "Random")
+
+        self.set_spin_box("spinBox", 100)
+
+    def _init_connection(self):
+        self._checkbox = self.find(QCheckBox, f"checkBox")
+        self._checkbox.clicked.connect(self._set_random_seed_spin_box_state)
+
+    def _set_random_seed_spin_box_state(self):
+        self.set_spin_box_enable("spinBox_seed", self._checkbox.isChecked())
+
+    @property
+    def number(self):
+        return self._number
+
+    @property
+    def seed(self):
+        return self._seed
+
+    @property
+    def function(self):
+        return self._function
+
+    def accept(self):
+        self._function = self.get_combobox_text("comboBox")
+        self._number = self.get_spin_box("spinBox")
+
+        if self._checkbox.isChecked():
+            self._seed = self.get_spin_box("spinBox_seed")
+
+        super().accept()
+
+    def reject(self):
+        self.close()
+
+
 class SelectSolverWindow(PamhyrDialog):
     _pamhyr_ui = "SelectSolver"
     _pamhyr_name = "Select solver"
@@ -427,3 +486,233 @@ class SolverLogWindow(PamhyrWindow):
             parent=self,
         )
         log.show()
+
+
+class SolverLogEnsWindow(SolverLogWindow):
+    _pamhyr_ui = "SolverLogEnsemble"
+    _pamhyr_name = "Solver Log Ensemble"
+
+    def __init__(self, number_of_run=100,
+                 seed=-1, function="Random",
+                 study=None, config=None,
+                 solver=None, parent=None):
+        self._number_of_run = number_of_run
+        self._last_run = 0
+
+        if seed != -1:
+            np.random.seed(seed)
+
+        self._seed = np.random.get_state()[1][0]
+        logger.info(
+            "solver: Set ensemble with " +
+            f"{number_of_run} {function} and " +
+            f"{self._seed} as random seed"
+        )
+
+        self._samples = {}
+        for ens in study.river._ensembles.lst:
+            if ens.distribution is None:
+                continue
+
+            self._samples[ens] = ens.random(self._number_of_run)
+
+        self._results = None
+        self._run_samples = []
+        self._results_tables = {}
+
+        super(SolverLogEnsWindow, self).__init__(
+            solver=solver,
+            study=study,
+            config=config,
+            parent=parent,
+        )
+
+    def setup_connections(self):
+        self.setup_progress_bar()
+
+        super(SolverLogEnsWindow, self).setup_connections()
+
+    def setup_progress_bar(self):
+        self._progress_bar = self.find(QProgressBar, "progressBar")
+        self._progress_bar.setRange(0, self._number_of_run)
+        self._progress_bar.setValue(0)
+
+    def _log_int(self, int_code, color=None):
+        logger.info(f"solver: Returns {int_code}")
+        color = "blue" if int_code == 0 else "red"
+
+        self.find(QTextEdit, "textEdit")\
+            .append(
+                f"<font color=\"{color}\">" +
+                f" *** Finished with code {int_code}" +
+                "</font>"
+            )
+
+        self.statusbar.showMessage(
+            ("Done" if int_code == 0 else "Failed")
+            + f" #{self._last_run}",
+            3000
+        )
+
+        self._solver.results_ensemble(
+            self._study, self._workdir,
+            self._results_tables,
+            self._last_run,
+            qlog=self._output,
+        )
+
+        if self._last_run < self._number_of_run:
+            self.next()
+        else:
+            self._results = self.fill_results_from_tables()
+            self._parent.set_results(self._solver, self._results)
+
+            self._progress_bar.setValue(self._last_run)
+
+    def fill_results_from_tables(self):
+        tables = self._results_tables
+        results = self._solver.get_ensemble_empty_results(
+            self._study, self._workdir
+        )
+
+        table = {}
+
+        for key in ["z", "q"]:
+            for func in ["min", "mean", "max", "std_derivation"]:
+                name = f"{key}_{func}"
+                table[name] = results.new_table_data(name, tables[name])
+
+        table["samples"] = results.new_table_data(
+            "samples", np.array(self._run_samples)
+        )
+        results.set("number_of_run", self._number_of_run)
+        results.set("seed", self._seed)  # Keep random seed
+
+        results.set("table", table)
+
+        # Compute global index for reaches and profiles
+        gi = 0
+        for reach in results.river.reachs:
+            gi_start = gi
+
+            for profile in reach.profiles:
+                gi += 1
+
+            reach.set_global_index(range(gi_start, gi))
+
+        # Compute timestamps index table
+        ts = tables["timestamps"]
+        ts_index = {}
+        for i, t in enumerate(sorted(ts)):
+            ts_index[t] = i
+
+        results.set("timestamps", ts)
+        results.set_timestamp_index(ts_index)
+
+        return results
+
+    def next(self):
+        self._process = self.new_process(self._parent)
+
+        self._log(f" *** Run #{self._last_run}", color="blue")
+
+        if self._solver._type in ["mage8"]:
+            samples = self._solver.export_ensemble_variation(
+                self._study, self._workdir, qlog=self._output,
+                samples=self._samples,
+            )
+        else:
+            samples = self.ensemble_variation()
+            self._solver.export(
+                self._study, self._workdir, qlog=self._output
+            )
+
+        # Keep samples generators results
+        self._run_samples.append(samples)
+
+        self._solver.run(
+            self._study,
+            process=self._process,
+            output_queue=self._output
+        )
+
+        self.set_running_button_status()
+
+        self._last_run += 1
+        self._progress_bar.setValue(self._last_run - 1)
+
+    def ensemble_variation(self):
+        samples = []
+
+        for ens in self._samples:
+            if ens.target_data is None:
+                continue
+
+            x = next(self._samples[ens])
+            samples.append(x)
+
+            self._log(f"*** Variation #{self._last_run} " +
+                      f"'{ens.target_data}' - {ens.data_type} x {x}",
+                      color="blue")
+
+            if ens.data_type == "strickler_minor":
+                ens.target_data.minor = x
+            elif ens.data_type == "strickler_medium":
+                ens.target_data.medium = x
+
+        return samples
+
+    def run(self):
+        self._log(f" *** Run solver {self._solver.name}", color="blue")
+        self.next()
+
+    def start(self):
+        if self._solver.is_stoped():
+            self._log(f" *** Export study {self._solver.name}", color="blue")
+
+            ok = self._solver.export(
+                self._study, self._workdir, qlog=self._output
+            )
+
+            if not ok:
+                self._log(f" *** Failed to export", color="red")
+                self.update()
+                return
+            else:
+                self.update()
+                self._process = self.new_process(self._parent)
+
+        self._log(" *** Start", color="blue")
+        self._results = None
+
+        self.next()
+
+    def set_running_button_status(self):
+        self.find(QAction, "action_start").setEnabled(False)
+        if _signal:
+            self.find(QAction, "action_pause").setEnabled(True)
+        else:
+            self.find(QAction, "action_pause").setEnabled(False)
+        self.find(QAction, "action_stop").setEnabled(True)
+        self.find(QAction, "action_log_file").setEnabled(False)
+        self.find(QAction, "action_results").setEnabled(False)
+
+    def stop(self):
+        self._log(" *** Stop", color="blue")
+        self._solver.kill()
+
+        self.find(QAction, "action_start").setEnabled(True)
+        self.find(QAction, "action_pause").setEnabled(False)
+        self.find(QAction, "action_stop").setEnabled(False)
+        self.find(QAction, "action_results").setEnabled(True)
+        if self._solver.log_file() != "":
+            self.find(QAction, "action_log_file").setEnabled(True)
+
+    def results(self):
+        if self._results is None:
+            return
+
+        self._parent.set_results(self._solver, self._results)
+        self._parent.open_solver_results(self._solver, self._results)
+
+        self._solver.has_results_loaded()

src/View/Scenarios/ContextMenu.py

@@ -47,11 +47,19 @@ class AbstractMenu(object):
 
 class DefaultMenu(AbstractMenu):
     def run(self):
+        current_scenario = self._graph.status.scenario
+
+        if current_scenario.is_ensemble():
+            return
+
         add_node = self._menu.addAction(self._trad["menu_add_scenario"])
+        ensemble = self._menu.addAction(self._trad["menu_ens_scenario"])
 
         action = self._exec()
         if action == add_node:
             self._parent.new_scenario(self._pos)
+        if action == ensemble:
+            self._parent.create_new_ensemble_scenario(self._pos)
 
 
 class ScenarioMenu(AbstractMenu):
@@ -61,9 +69,13 @@ class ScenarioMenu(AbstractMenu):
 
         current_scenario = item.graph._study.status.scenario.id
 
-        select = self._menu.addAction(self._trad["menu_select_scenario"])
+        select = None
         duplicate = None
         delete = None
+        edit_ens = None
+
+        if len(scenarios) > 1:
+            select = self._menu.addAction(self._trad["menu_select_scenario"])
 
         if item.scenario.id != 0:
             if scenarios.is_leaf(item.scenario):
@@ -74,6 +86,11 @@ class ScenarioMenu(AbstractMenu):
                     self._trad["menu_dup_scenario"]
                 )
 
+                if item.scenario.is_ensemble():
+                    edit_ens = self._menu.addAction(
+                        self._trad["menu_edit_ens_scenario"]
+                    )
+
         action = self._exec()
         if action is None:
             return
@@ -83,3 +100,5 @@ class ScenarioMenu(AbstractMenu):
             self._parent.delete_scenario(item)
         elif action == duplicate:
             self._parent.duplicate_scenario(item)
+        elif action == edit_ens:
+            self._parent.edit_ensemble_scenario(item)

src/View/Scenarios/GraphWidget.py

@@ -100,7 +100,11 @@ class ScenarioItem(QGraphicsTextItem):
             )
         )
         painter.setBrush(QBrush(color))
-        painter.drawEllipse(self.boundingRect())
+
+        if self.scenario.is_ensemble():
+            painter.drawRect(self.boundingRect())
+        else:
+            painter.drawEllipse(self.boundingRect())
 
         super(ScenarioItem, self).paint(painter, option, widget)
 
@@ -526,6 +530,51 @@ class GraphWidget(QGraphicsView):
         self.exec_with_waiting_window(fn, "duplicate_scenario")
         self.changeScenario.emit(self.sender())
 
+    def create_ensemble_scenario(self, item):
+        must_save = self.dialog_save()
+        if must_save == "Cancel":
+            return
+
+        def fn():
+            self._close_other_window()
+
+            if must_save == "Save":
+                self._study.save()
+
+            self._undo.push(
+                CreateEnsembleScenarioCommand(
+                    self._study,
+                )
+            )
+
+        self.exec_with_waiting_window(fn, "create_ensemble_scenario")
+        self.changeScenario.emit(self.sender())
+
+    def create_new_ensemble_scenario(self, pos):
+        must_save = self.dialog_save()
+        if must_save == "Cancel":
+            return
+
+        def fn():
+            self._close_other_window()
+
+            if must_save == "Save":
+                self._study.save()
+
+            self._undo.push(
+                CreateEnsembleScenarioCommand(
+                    self._study, pos=pos,
+                )
+            )
+
+        self.exec_with_waiting_window(fn, "create_ensemble_scenario")
+        self.changeScenario.emit(self.sender())
+
+    def edit_ensemble_scenario(self, item):
+        self.parent\
+            .parent\
+            .open_ensemble_scenario()
+
     def _close_other_window(self):
         self.parent\
             .parent\

src/View/Scenarios/UndoCommand.py

@@ -98,6 +98,26 @@ class DuplicateScenariosCommand(QUndoCommand):
             self._study.reload_from_scenario(self._new)
 
 
+class CreateEnsembleScenarioCommand(QUndoCommand):
+    def __init__(self, study, pos=None):
+        QUndoCommand.__init__(self)
+
+        self._study = study
+        self._new = None
+        self._pos = pos
+
+    def undo(self):
+        self._study.scenarios.delete(self._new.id)
+        self._study.reload_from_scenario(self._new.parent)
+
+    def redo(self):
+        if self._new is None:
+            self._new = self._study.create_ensemble_scenario(self._pos)
+        else:
+            self._new.set_as_not_deleted()
+            self._study.reload_from_scenario(self._new)
+
+
 class SetCommand(QUndoCommand):
     def __init__(self, scenario, column, new_value):
         QUndoCommand.__init__(self)

src/View/Scenarios/translate.py

@@ -43,6 +43,12 @@ class ScenariosTranslate(MainTranslate):
         self._dict["menu_dup_scenario"] = _translate(
             "Scenarios", "Duplicate this scenario"
         )
+        self._dict["menu_ens_scenario"] = _translate(
+            "Scenarios", "Create ensemble scenario from current scenario"
+        )
+        self._dict["menu_edit_ens_scenario"] = _translate(
+            "Scenarios", "Edit this ensemble scenario"
+        )
 
         self._sub_dict["table_headers_scenarios"] = {
             # "id": self._dict['id'],

src/View/Tools/ASubWindow.py

@@ -107,7 +107,7 @@ class WindowToolKit(object):
 
         dialog = QFileDialog(self, options=options)
 
-        if select_file == "Existing_file":
+        if select_file == "ExistingFile":
             mode = QFileDialog.FileMode.ExistingFile
         elif select_file == "Directory":
             mode = QFileDialog.FileMode.Directory
@@ -390,6 +390,18 @@ class ASubWindowFeatures(object):
         """
         return self.find(QSpinBox, name).value()
 
+    def set_spin_box_enable(self, name: str, value: bool):
+        """Set status of spinbox component
+
+        Args:
+            name: The spinbox component name
+            value: The boolean value
+
+        Returns:
+            Nothing
+        """
+        self.find(QSpinBox, name).setEnabled(value)
+
     def set_double_spin_box(self, name: str, value: int):
         """Set value of spinbox component
 

src/View/Tools/PamhyrPlot.py

@@ -42,6 +42,12 @@ class PamhyrPlot(APlot):
     color_plot_river_bottom = "grey"
     color_plot_river_water = "blue"
     color_plot_river_water_zone = "skyblue"
+
+    color_plot_ensemble_min = "green"
+    color_plot_ensemble_mean = "black"
+    color_plot_ensemble_max = "red"
+    color_plot_ensemble_std_deriv = "black"
+
     colors = list(mplcolors.TABLEAU_COLORS)
     linestyle = ['solid', 'dashed', 'dashdot', 'dotted']
 

src/View/Tools/PamhyrTree.py

@@ -0,0 +1,113 @@
+# PamhyrTree.py -- Pamhyr abstract table model
+# Copyright (C) 2023-2026  INRAE
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# -*- coding: utf-8 -*-
+
+import logging
+import traceback
+
+from tools import trace, timer
+
+from Model.Except import NotImplementedMethodeError
+
+from PyQt5.QtCore import (
+    Qt, QVariant, QAbstractItemModel,
+    QCoreApplication, QModelIndex, pyqtSlot,
+)
+
+from PyQt5.QtWidgets import (
+    QTreeWidget, QTreeWidgetItem,
+)
+
+logger = logging.getLogger()
+
+
+class PamhyrModelItem(QTreeWidgetItem):
+    def __init__(self, data=None, trad=None, parent=None):
+        self._data = data
+        self._name = self._get_name()
+
+        super(PamhyrModelItem, self).__init__(
+            parent, [self._name],
+        )
+
+        self._setup_children()
+
+    def _get_name(self):
+        return str(self._data)
+
+    def _setup_children(self):
+        return
+
+    def get_value(self):
+        return self._data
+
+    def find_item_by_value(self, data):
+        if self.get_value() == data:
+            return self
+
+        for i in range(self.childCount()):
+            item = self.child(i)
+            if item.get_value() == data:
+                return item
+
+            found = item.find_item_by_value(data)
+            if found:
+                return found
+
+        return None
+
+
+class PamhyrModelListItem(QTreeWidgetItem):
+    def __init__(self, name=None, lst=None,
+                 child_item_ctor=PamhyrModelItem,
+                 trad=None, parent=None):
+        super(PamhyrModelListItem, self).__init__(
+            parent, [name],
+        )
+
+        self._name = name
+        self._lst = lst
+        self._trad = trad
+        self._child_item_ctor = child_item_ctor
+
+        self._setup_children()
+
+    def _setup_children(self):
+        for el in self._lst.lst:
+            self.addChild(
+                self._child_item_ctor(
+                    data=el, trad=self._trad, parent=self
+                )
+            )
+
+    def get_value(self):
+        return None
+
+    def find_item_by_value(self, data):
+        if self.get_value() == data:
+            return self
+
+        for i in range(self.childCount()):
+            item = self.child(i)
+            if item.get_value() == data:
+                return item
+
+            found = item.find_item_by_value(data)
+            if found:
+                return found
+
+        return None

src/View/Translate.py

@@ -40,6 +40,12 @@ class CommonWordTranslate(PamhyrTranslate):
         self._dict["time"] = _translate("CommonWord", "Time")
         self._dict["date"] = _translate("CommonWord", "Date")
 
+        self._dict["low"] = _translate("CommonWord", "Low")
+        self._dict["high"] = _translate("CommonWord", "High")
+
+        self._dict["loc"] = _translate("CommonWord", "Loc")
+        self._dict["scale"] = _translate("CommonWord", "Scale")
+
         self._dict["reach"] = _translate("CommonWord", "Reach")
         self._dict["reaches"] = _translate("CommonWord", "Reaches")
         self._dict["Select reach"] = _translate("CommonWord", "Select reach")
@@ -65,6 +71,9 @@ class CommonWordTranslate(PamhyrTranslate):
         self._dict["file_csv"] = _translate(
             "CommonWord", "CSV file (*.csv)"
         )
+        self._dict["file_json"] = _translate(
+            "CommonWord", "JSON file (*.json)"
+        )
 
 
 class UnitTranslate(CommonWordTranslate):
@@ -103,6 +112,12 @@ class UnitTranslate(CommonWordTranslate):
         self._dict["unit_water_elevation"] = _translate(
             "Unit", "Water Elevation (m)"
         )
+        self._dict["unit_mean_water_elevation"] = _translate(
+            "Unit", "Mean water elevation (m)"
+        )
+        self._dict["unit_std_deriv_elevation"] = _translate(
+            "Unit", "Elevation standard derivation (m)"
+        )
         self._dict["unit_water_elevation_envelop"] = _translate(
             "Unit", "Water Elevation Envelop (m)"
         )
@@ -122,8 +137,16 @@ class UnitTranslate(CommonWordTranslate):
         self._dict["unit_min_velocity"] = _translate(
             "Unit", "Min Velocity (m/s)"
         )
-        self._dict["unit_discharge"] = _translate(
+        self._dict["unit_discharge"] = (
-                "Unit", "Discharge") + f" (m³/s)"
+            _translate("Unit", "Discharge") + f" (m³/s)"
+        )
+        self._dict["unit_mean_discharge"] = (
+            _translate("Unit", "Mean discharge") + f" (m³/s)"
+        )
+        self._dict["unit_std_deriv_discharge"] = (
+            _translate("Unit", "Discharge standard derivation")
+            + f" (m³/s)"
+        )
         self._dict["unit_discharge_envelop"] = _translate(
             "Unit", "Discharge Envelop") + " (m³/s)"
         self._dict["unit_max_discharge"] = _translate(

src/View/ui/CustomExportDialog.ui

@@ -0,0 +1,111 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>Dialog</class>
+ <widget class="QDialog" name="Dialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>418</width>
+    <height>220</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Dialog</string>
+  </property>
+  <layout class="QGridLayout" name="gridLayout">
+   <item row="3" column="0">
+    <widget class="QSplitter" name="splitter">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <widget class="QWidget" name="verticalLayoutWidget">
+      <layout class="QVBoxLayout" name="verticalLayout_x">
+       <item>
+        <widget class="QLabel" name="label_x">
+         <property name="text">
+          <string>X axis:</string>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </widget>
+     <widget class="QWidget" name="verticalLayoutWidget_2">
+      <layout class="QVBoxLayout" name="verticalLayout_y">
+       <item>
+        <widget class="QLabel" name="label_y">
+         <property name="text">
+          <string>Y axis:</string>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </widget>
+     <widget class="QWidget" name="verticalLayoutWidget_3">
+      <layout class="QVBoxLayout" name="verticalLayout_solv">
+       <item>
+        <widget class="QLabel" name="label_solv">
+         <property name="text">
+          <string>Solver:</string>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </widget>
+    </widget>
+   </item>
+   <item row="5" column="0">
+    <widget class="QDialogButtonBox" name="buttonBox">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <property name="standardButtons">
+      <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
+     </property>
+    </widget>
+   </item>
+   <item row="4" column="0">
+    <widget class="QLabel" name="label_data">
+     <property name="text">
+      <string>TextLabel</string>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>rejected()</signal>
+   <receiver>Dialog</receiver>
+   <slot>reject()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>316</x>
+     <y>260</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>286</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>accepted()</signal>
+   <receiver>Dialog</receiver>
+   <slot>accept()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>248</x>
+     <y>254</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>157</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
+</ui>

src/View/ui/DebugTimer.ui

@@ -18,6 +18,13 @@
     <item row="0" column="0">
      <widget class="QTableView" name="tableView"/>
     </item>
+    <item row="1" column="0">
+     <widget class="QLabel" name="label">
+      <property name="text">
+       <string>TextLabel</string>
+      </property>
+     </widget>
+    </item>
    </layout>
   </widget>
   <widget class="QMenuBar" name="menubar">

src/View/ui/Ensemble1ParamsDialog.ui

@@ -0,0 +1,85 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>Dialog</class>
+ <widget class="QDialog" name="Dialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>416</width>
+    <height>81</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Dialog</string>
+  </property>
+  <layout class="QGridLayout" name="gridLayout">
+   <item row="0" column="0">
+    <layout class="QHBoxLayout" name="horizontalLayout">
+     <item>
+      <widget class="QLabel" name="label_0">
+       <property name="text">
+        <string>@param0</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QDoubleSpinBox" name="doubleSpinBox_0">
+       <property name="minimum">
+        <double>-100000.000000000000000</double>
+       </property>
+       <property name="maximum">
+        <double>100000.000000000000000</double>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item row="1" column="0">
+    <widget class="QDialogButtonBox" name="buttonBox">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <property name="standardButtons">
+      <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>accepted()</signal>
+   <receiver>Dialog</receiver>
+   <slot>accept()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>248</x>
+     <y>254</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>157</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>rejected()</signal>
+   <receiver>Dialog</receiver>
+   <slot>reject()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>316</x>
+     <y>260</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>286</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
+</ui>

src/View/ui/Ensemble2ParamsDialog.ui

@@ -0,0 +1,106 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>Dialog</class>
+ <widget class="QDialog" name="Dialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>416</width>
+    <height>81</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Dialog</string>
+  </property>
+  <layout class="QGridLayout" name="gridLayout">
+   <item row="0" column="0">
+    <layout class="QHBoxLayout" name="horizontalLayout">
+     <item>
+      <widget class="QLabel" name="label_0">
+       <property name="text">
+        <string>@param0</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QDoubleSpinBox" name="doubleSpinBox_0">
+       <property name="minimum">
+        <double>-100000.000000000000000</double>
+       </property>
+       <property name="maximum">
+        <double>100000.000000000000000</double>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item row="0" column="1">
+    <layout class="QHBoxLayout" name="horizontalLayout_2">
+     <item>
+      <widget class="QLabel" name="label_1">
+       <property name="text">
+        <string>@param1</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QDoubleSpinBox" name="doubleSpinBox_1">
+       <property name="minimum">
+        <double>-100000.000000000000000</double>
+       </property>
+       <property name="maximum">
+        <double>100000.000000000000000</double>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item row="1" column="0" colspan="2">
+    <widget class="QDialogButtonBox" name="buttonBox">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <property name="standardButtons">
+      <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>accepted()</signal>
+   <receiver>Dialog</receiver>
+   <slot>accept()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>248</x>
+     <y>254</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>157</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>rejected()</signal>
+   <receiver>Dialog</receiver>
+   <slot>reject()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>316</x>
+     <y>260</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>286</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
+</ui>

src/View/ui/EnsembleEditDialog.ui

@@ -0,0 +1,157 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>Dialog</class>
+ <widget class="QDialog" name="Dialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>875</width>
+    <height>415</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Dialog</string>
+  </property>
+  <layout class="QGridLayout" name="gridLayout_3">
+   <item row="0" column="0">
+    <widget class="QLabel" name="label">
+     <property name="text">
+      <string>Name</string>
+     </property>
+    </widget>
+   </item>
+   <item row="0" column="1">
+    <widget class="QLineEdit" name="lineEdit_name"/>
+   </item>
+   <item row="0" column="2">
+    <widget class="QLabel" name="label_3">
+     <property name="text">
+      <string>Distribution</string>
+     </property>
+    </widget>
+   </item>
+   <item row="0" column="3">
+    <widget class="QComboBox" name="comboBox_distribution"/>
+   </item>
+   <item row="0" column="4">
+    <spacer name="horizontalSpacer_2">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <property name="sizeHint" stdset="0">
+      <size>
+       <width>313</width>
+       <height>20</height>
+      </size>
+     </property>
+    </spacer>
+   </item>
+   <item row="1" column="0" rowspan="2" colspan="2">
+    <widget class="QGroupBox" name="groupBox_target_data">
+     <property name="title">
+      <string>Target data</string>
+     </property>
+     <layout class="QGridLayout" name="gridLayout">
+      <item row="0" column="0">
+       <widget class="QTreeWidget" name="treeWidget_target_data">
+        <column>
+         <property name="text">
+          <string notr="true">1</string>
+         </property>
+        </column>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item row="1" column="2" colspan="3">
+    <widget class="QGroupBox" name="groupBox_params">
+     <property name="title">
+      <string>Parameters</string>
+     </property>
+     <layout class="QGridLayout" name="gridLayout_2">
+      <item row="0" column="0">
+       <layout class="QVBoxLayout" name="verticalLayout_params"/>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item row="2" column="2" colspan="3">
+    <layout class="QHBoxLayout" name="horizontalLayout">
+     <item>
+      <spacer name="horizontalSpacer">
+       <property name="orientation">
+        <enum>Qt::Horizontal</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>40</width>
+         <height>20</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+     <item>
+      <spacer name="verticalSpacer">
+       <property name="orientation">
+        <enum>Qt::Vertical</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>20</width>
+         <height>40</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+    </layout>
+   </item>
+   <item row="3" column="2" colspan="3">
+    <widget class="QDialogButtonBox" name="buttonBox">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <property name="standardButtons">
+      <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>accepted()</signal>
+   <receiver>Dialog</receiver>
+   <slot>accept()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>248</x>
+     <y>254</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>157</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>rejected()</signal>
+   <receiver>Dialog</receiver>
+   <slot>reject()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>316</x>
+     <y>260</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>286</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
+</ui>

src/View/ui/EnsembleRunNumberDialog.ui

@@ -0,0 +1,123 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>Dialog</class>
+ <widget class="QDialog" name="Dialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>152</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Dialog</string>
+  </property>
+  <layout class="QGridLayout" name="gridLayout">
+   <item row="0" column="0">
+    <layout class="QHBoxLayout" name="horizontalLayout">
+     <item>
+      <widget class="QLabel" name="label_2">
+       <property name="text">
+        <string>Draw function</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QComboBox" name="comboBox"/>
+     </item>
+    </layout>
+   </item>
+   <item row="1" column="0">
+    <layout class="QHBoxLayout" name="horizontalLayout_2">
+     <item>
+      <widget class="QLabel" name="label">
+       <property name="text">
+        <string>Number of run</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QSpinBox" name="spinBox">
+       <property name="minimum">
+        <number>1</number>
+       </property>
+       <property name="maximum">
+        <number>1000000</number>
+       </property>
+       <property name="value">
+        <number>100</number>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item row="2" column="0">
+    <layout class="QHBoxLayout" name="horizontalLayout_3">
+     <item>
+      <widget class="QCheckBox" name="checkBox">
+       <property name="text">
+        <string>Custom seed</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QSpinBox" name="spinBox_seed">
+       <property name="enabled">
+        <bool>false</bool>
+       </property>
+       <property name="maximum">
+        <number>2147483647</number>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item row="3" column="0">
+    <widget class="QDialogButtonBox" name="buttonBox">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <property name="standardButtons">
+      <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>accepted()</signal>
+   <receiver>Dialog</receiver>
+   <slot>accept()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>248</x>
+     <y>254</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>157</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>rejected()</signal>
+   <receiver>Dialog</receiver>
+   <slot>reject()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>316</x>
+     <y>260</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>286</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
+</ui>

src/View/ui/Ensembles.ui

@@ -0,0 +1,112 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>MainWindow</class>
+ <widget class="QMainWindow" name="MainWindow">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>800</width>
+    <height>600</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>MainWindow</string>
+  </property>
+  <widget class="QWidget" name="centralwidget">
+   <layout class="QGridLayout" name="gridLayout">
+    <item row="0" column="0">
+     <widget class="QTableView" name="tableView"/>
+    </item>
+   </layout>
+  </widget>
+  <widget class="QToolBar" name="toolBar">
+   <property name="windowTitle">
+    <string>toolBar</string>
+   </property>
+   <attribute name="toolBarArea">
+    <enum>TopToolBarArea</enum>
+   </attribute>
+   <attribute name="toolBarBreak">
+    <bool>false</bool>
+   </attribute>
+   <addaction name="action_add"/>
+   <addaction name="action_del"/>
+   <addaction name="action_edit"/>
+   <addaction name="separator"/>
+   <addaction name="action_export"/>
+   <addaction name="action_import"/>
+  </widget>
+  <action name="action_add">
+   <property name="icon">
+    <iconset>
+     <normaloff>ressources/add.png</normaloff>ressources/add.png</iconset>
+   </property>
+   <property name="text">
+    <string>Add</string>
+   </property>
+   <property name="toolTip">
+    <string>Add ensemble</string>
+   </property>
+   <property name="menuRole">
+    <enum>QAction::NoRole</enum>
+   </property>
+  </action>
+  <action name="action_del">
+   <property name="icon">
+    <iconset>
+     <normaloff>ressources/del.png</normaloff>ressources/del.png</iconset>
+   </property>
+   <property name="text">
+    <string>Delete</string>
+   </property>
+   <property name="toolTip">
+    <string>Delete selected ensembles</string>
+   </property>
+   <property name="menuRole">
+    <enum>QAction::NoRole</enum>
+   </property>
+  </action>
+  <action name="action_edit">
+   <property name="icon">
+    <iconset>
+     <normaloff>ressources/edit.png</normaloff>ressources/edit.png</iconset>
+   </property>
+   <property name="text">
+    <string>Edit</string>
+   </property>
+   <property name="toolTip">
+    <string>Edit ensembles range</string>
+   </property>
+   <property name="menuRole">
+    <enum>QAction::NoRole</enum>
+   </property>
+  </action>
+  <action name="action_export">
+   <property name="icon">
+    <iconset>
+     <normaloff>ressources/export.png</normaloff>ressources/export.png</iconset>
+   </property>
+   <property name="text">
+    <string>Export</string>
+   </property>
+   <property name="toolTip">
+    <string>Export all ensemble configuration into json file</string>
+   </property>
+  </action>
+  <action name="action_import">
+   <property name="icon">
+    <iconset>
+     <normaloff>ressources/import.png</normaloff>ressources/import.png</iconset>
+   </property>
+   <property name="text">
+    <string>Import</string>
+   </property>
+   <property name="toolTip">
+    <string>Import ensemble configuration from json file</string>
+   </property>
+  </action>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

src/View/ui/ResultsEnsemble.ui

@@ -0,0 +1,232 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>MainWindow</class>
+ <widget class="QMainWindow" name="MainWindow">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>1280</width>
+    <height>720</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>MainWindow</string>
+  </property>
+  <property name="locale">
+   <locale language="English" country="Europe"/>
+  </property>
+  <widget class="QWidget" name="centralwidget">
+   <property name="minimumSize">
+    <size>
+     <width>874</width>
+     <height>0</height>
+    </size>
+   </property>
+   <layout class="QGridLayout" name="gridLayout_3">
+    <item row="0" column="0">
+     <widget class="QSplitter" name="splitter_4">
+      <property name="orientation">
+       <enum>Qt::Horizontal</enum>
+      </property>
+      <widget class="QSplitter" name="splitter_3">
+       <property name="orientation">
+        <enum>Qt::Vertical</enum>
+       </property>
+       <widget class="QTableView" name="tableView_reach"/>
+       <widget class="QWidget" name="layoutWidget">
+        <layout class="QHBoxLayout" name="horizontalLayout">
+         <item>
+          <widget class="QTableView" name="tableView_profile"/>
+         </item>
+        </layout>
+       </widget>
+       <widget class="QWidget" name="horizontalLayoutWidget">
+        <layout class="QHBoxLayout" name="horizontalLayout_5">
+         <item>
+          <widget class="QTableView" name="tableView_runs"/>
+         </item>
+        </layout>
+       </widget>
+      </widget>
+      <widget class="QWidget" name="layoutWidget">
+       <layout class="QGridLayout" name="gridLayout_2">
+        <item row="1" column="0">
+         <layout class="QHBoxLayout" name="horizontalLayout_2">
+          <item>
+           <widget class="QPushButton" name="firstButton">
+            <property name="text">
+             <string/>
+            </property>
+            <property name="icon">
+             <iconset>
+              <normaloff>ressources/media-skip-backward.png</normaloff>ressources/media-skip-backward.png</iconset>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <widget class="QPushButton" name="backButton">
+            <property name="text">
+             <string/>
+            </property>
+            <property name="icon">
+             <iconset>
+              <normaloff>ressources/media-seek-backward.png</normaloff>ressources/media-seek-backward.png</iconset>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <widget class="QPushButton" name="playButton">
+            <property name="enabled">
+             <bool>true</bool>
+            </property>
+            <property name="mouseTracking">
+             <bool>true</bool>
+            </property>
+            <property name="contextMenuPolicy">
+             <enum>Qt::DefaultContextMenu</enum>
+            </property>
+            <property name="autoFillBackground">
+             <bool>true</bool>
+            </property>
+            <property name="text">
+             <string/>
+            </property>
+            <property name="icon">
+             <iconset>
+              <normaloff>ressources/media-playback-start.png</normaloff>
+              <normalon>ressources/media-playback-pause.png</normalon>ressources/media-playback-start.png</iconset>
+            </property>
+            <property name="checkable">
+             <bool>true</bool>
+            </property>
+            <property name="checked">
+             <bool>true</bool>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <widget class="QPushButton" name="nextButton">
+            <property name="text">
+             <string/>
+            </property>
+            <property name="icon">
+             <iconset>
+              <normaloff>ressources/media-seek-forward.png</normaloff>ressources/media-seek-forward.png</iconset>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <widget class="QPushButton" name="lastButton">
+            <property name="text">
+             <string/>
+            </property>
+            <property name="icon">
+             <iconset>
+              <normaloff>ressources/media-skip-forward.png</normaloff>ressources/media-skip-forward.png</iconset>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <widget class="QSlider" name="horizontalSlider_time">
+            <property name="orientation">
+             <enum>Qt::Horizontal</enum>
+            </property>
+           </widget>
+          </item>
+         </layout>
+        </item>
+        <item row="0" column="0">
+         <widget class="QTabWidget" name="tabWidget">
+          <property name="currentIndex">
+           <number>0</number>
+          </property>
+          <property name="tabsClosable">
+           <bool>true</bool>
+          </property>
+          <widget class="QWidget" name="tab">
+           <attribute name="title">
+            <string>Water elevation</string>
+           </attribute>
+           <layout class="QGridLayout" name="gridLayout">
+            <item row="0" column="0">
+             <layout class="QVBoxLayout" name="verticalLayout_elevation"/>
+            </item>
+           </layout>
+          </widget>
+          <widget class="QWidget" name="tab_2">
+           <attribute name="title">
+            <string>Discharge time series</string>
+           </attribute>
+           <layout class="QGridLayout" name="gridLayout_4">
+            <item row="0" column="0">
+             <layout class="QVBoxLayout" name="verticalLayout_hydrograph"/>
+            </item>
+           </layout>
+          </widget>
+         </widget>
+        </item>
+       </layout>
+      </widget>
+     </widget>
+    </item>
+   </layout>
+  </widget>
+  <widget class="QMenuBar" name="menubar">
+   <property name="geometry">
+    <rect>
+     <x>0</x>
+     <y>0</y>
+     <width>1280</width>
+     <height>24</height>
+    </rect>
+   </property>
+  </widget>
+  <widget class="QStatusBar" name="statusbar"/>
+  <widget class="QToolBar" name="toolBar">
+   <property name="enabled">
+    <bool>true</bool>
+   </property>
+   <property name="windowTitle">
+    <string>toolBar</string>
+   </property>
+   <attribute name="toolBarArea">
+    <enum>TopToolBarArea</enum>
+   </attribute>
+   <attribute name="toolBarBreak">
+    <bool>false</bool>
+   </attribute>
+   <addaction name="action_export"/>
+   <addaction name="action_import_data"/>
+  </widget>
+  <action name="action_export">
+   <property name="icon">
+    <iconset>
+     <normaloff>ressources/export.png</normaloff>ressources/export.png</iconset>
+   </property>
+   <property name="text">
+    <string>Export</string>
+   </property>
+   <property name="toolTip">
+    <string>Export data as CSV</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+E</string>
+   </property>
+  </action>
+  <action name="action_import_data">
+   <property name="icon">
+    <iconset>
+     <normaloff>ressources/import.png</normaloff>ressources/import.png</iconset>
+   </property>
+   <property name="text">
+    <string>Import data</string>
+   </property>
+   <property name="toolTip">
+    <string>Import data from SCV file</string>
+   </property>
+  </action>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

src/View/ui/SolverLogEnsemble.ui

@@ -0,0 +1,123 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>MainWindow</class>
+ <widget class="QMainWindow" name="MainWindow">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>1152</width>
+    <height>648</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>MainWindow</string>
+  </property>
+  <widget class="QWidget" name="centralwidget">
+   <layout class="QGridLayout" name="gridLayout">
+    <item row="0" column="0">
+     <widget class="QTextEdit" name="textEdit">
+      <property name="font">
+       <font>
+        <family>Monospace</family>
+        <pointsize>10</pointsize>
+       </font>
+      </property>
+      <property name="locale">
+       <locale language="English" country="Europe"/>
+      </property>
+      <property name="documentTitle">
+       <string notr="true"/>
+      </property>
+      <property name="undoRedoEnabled">
+       <bool>false</bool>
+      </property>
+      <property name="readOnly">
+       <bool>true</bool>
+      </property>
+     </widget>
+    </item>
+    <item row="1" column="0">
+     <widget class="QProgressBar" name="progressBar">
+      <property name="value">
+       <number>24</number>
+      </property>
+     </widget>
+    </item>
+   </layout>
+  </widget>
+  <widget class="QMenuBar" name="menubar">
+   <property name="geometry">
+    <rect>
+     <x>0</x>
+     <y>0</y>
+     <width>1152</width>
+     <height>24</height>
+    </rect>
+   </property>
+  </widget>
+  <widget class="QStatusBar" name="statusbar"/>
+  <widget class="QToolBar" name="toolBar">
+   <property name="enabled">
+    <bool>true</bool>
+   </property>
+   <property name="windowTitle">
+    <string>toolBar</string>
+   </property>
+   <attribute name="toolBarArea">
+    <enum>TopToolBarArea</enum>
+   </attribute>
+   <attribute name="toolBarBreak">
+    <bool>false</bool>
+   </attribute>
+   <addaction name="action_start"/>
+   <addaction name="action_pause"/>
+   <addaction name="action_stop"/>
+   <addaction name="action_log_file"/>
+   <addaction name="action_results"/>
+  </widget>
+  <action name="action_stop">
+   <property name="icon">
+    <iconset>
+     <normaloff>ressources/close.png</normaloff>ressources/close.png</iconset>
+   </property>
+   <property name="text">
+    <string>Stop</string>
+   </property>
+  </action>
+  <action name="action_start">
+   <property name="icon">
+    <iconset>
+     <normaloff>ressources/run.png</normaloff>ressources/run.png</iconset>
+   </property>
+   <property name="text">
+    <string>Start</string>
+   </property>
+  </action>
+  <action name="action_pause">
+   <property name="icon">
+    <iconset>
+     <normaloff>ressources/player_pause.png</normaloff>ressources/player_pause.png</iconset>
+   </property>
+   <property name="text">
+    <string>Pause</string>
+   </property>
+  </action>
+  <action name="action_log_file">
+   <property name="icon">
+    <iconset>
+     <normaloff>ressources/zoom.png</normaloff>ressources/zoom.png</iconset>
+   </property>
+   <property name="text">
+    <string>LogFile</string>
+   </property>
+  </action>
+  <action name="action_results">
+   <property name="text">
+    <string>results</string>
+   </property>
+  </action>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

src/View/ui/Widgets/Ensemble1ParamsWidget.ui

@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>Form</class>
+ <widget class="QWidget" name="Form">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>482</width>
+    <height>48</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+  <layout class="QGridLayout" name="gridLayout">
+   <item row="0" column="0">
+    <layout class="QHBoxLayout" name="horizontalLayout">
+     <item>
+      <widget class="QLabel" name="label_0">
+       <property name="text">
+        <string>Parameter 1</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QDoubleSpinBox" name="doubleSpinBox_0">
+       <property name="minimum">
+        <double>-10000000000.000000000000000</double>
+       </property>
+       <property name="maximum">
+        <double>10000000000.000000000000000</double>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

src/View/ui/Widgets/Ensemble2ParamsWidget.ui

@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>Form</class>
+ <widget class="QWidget" name="Form">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>416</width>
+    <height>80</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+  <layout class="QGridLayout" name="gridLayout">
+   <item row="0" column="0">
+    <widget class="QLabel" name="label_0">
+     <property name="text">
+      <string>Parameter 1</string>
+     </property>
+    </widget>
+   </item>
+   <item row="0" column="1">
+    <widget class="QDoubleSpinBox" name="doubleSpinBox_0">
+     <property name="minimum">
+      <double>-10000000000.000000000000000</double>
+     </property>
+     <property name="maximum">
+      <double>10000000000.000000000000000</double>
+     </property>
+    </widget>
+   </item>
+   <item row="1" column="0">
+    <widget class="QLabel" name="label_1">
+     <property name="text">
+      <string>Parameter 2</string>
+     </property>
+    </widget>
+   </item>
+   <item row="1" column="1">
+    <widget class="QDoubleSpinBox" name="doubleSpinBox_1">
+     <property name="minimum">
+      <double>-10000000000.000000000000000</double>
+     </property>
+     <property name="maximum">
+      <double>10000000000.000000000000000</double>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

src/config.py

@@ -195,7 +195,7 @@ class Config(SQL):
                     )
 
             if major == "0" and minor <= "2":
-                if int(release) < 8:
+                if int(release) < 10:
                     posix = os.name == 'posix'
                     ext = "" if posix else ".exe"
                     path = os.path.join("@install_dir",
@@ -215,7 +215,6 @@ class Config(SQL):
                       )
                     """)
 
-                if int(release) < 9:
                     self.execute(
                         "INSERT OR IGNORE INTO data "
                         "VALUES ('display_manning', 'False')"