add zfd in results

src/Solver/Mage.py

@@ -19,6 +19,7 @@
 import os
 import logging
 import numpy as np
+from functools import reduce
 
 from itertools import chain
 from tools import timer, trace, logger_exception
@@ -1366,6 +1367,40 @@ class Mage8(Mage):
                 )
                 end = newline().size <= 0
 
+            ts_list = sorted(ts)
+
+            logger.info(f"compute river bed elevation...")
+
+            for r in reachs:
+                z_min = reach.geometry.get_z_min()
+                sls = list(map(
+                    lambda p: p.get_ts_key(ts_list[0], "sl")[0],
+                    r.profiles
+                    ))
+                z_br = list(map(
+                            lambda z, sl: reduce(
+                                lambda z, h: z - h[0],
+                                sl, z
+                            ),
+                            z_min,          # Original geometry
+                            sls             # Original sediment layers
+                            ))
+                for t in ts_list:
+                    sls = list(map(
+                        lambda p: p.get_ts_key(t, "sl")[0],
+                        r.profiles
+                        ))
+                    zfd = list(map(
+                                lambda z, sl: reduce(
+                                    lambda z, h: z + h[0],
+                                    sl, z
+                                ),
+                                z_br,       # bedrock
+                                sls         # Original sediment layers
+                            ))
+                    for i, p in enumerate(r.profiles):
+                        r.set(i, t, "zfd", zfd[i])
+
             results.set("sediment_timestamps", ts)
             logger.info(f"read_gra: ... end with {len(ts)} timestamp read")