SL: Add sediment layer Model and UI files schemes.

src/Model/River.py

@@ -15,6 +15,7 @@ from Model.InitialConditions.InitialConditionsDict import InitialConditionsDict
 from Model.Stricklers.StricklersList import StricklersList
 from Model.Friction.FrictionList import FrictionList
 from Model.SolverParameters.SolverParametersList import SolverParametersList
+from Model.SedimentLayer.SedimentLayerList import SedimentLayerList
 
 from Solver.Solvers import solver_type_list
 
@@ -192,6 +193,7 @@ class River(Graph, SQLSubModel):
         InitialConditionsDict,
         StricklersList,
         SolverParametersList,
+        SedimentLayerList,
     ]
 
     def __init__(self, status=None):
@@ -207,6 +209,7 @@ class River(Graph, SQLSubModel):
         self._initial_conditions = InitialConditionsDict(status=self._status)
         self._stricklers = StricklersList(status=self._status)
         self._parameters = {}
+        self._sediment_layers = SedimentLayerList()
 
     @classmethod
     def _sql_create(cls, execute):
@@ -301,6 +304,10 @@ class River(Graph, SQLSubModel):
     def initial_conditions(self):
         return self._initial_conditions
 
+    @property
+    def sediment_layers(self):
+        return self._sediment_layers
+
     @property
     def stricklers(self):
         return self._stricklers