auto BC generation

src/Model/BoundaryCondition/BoundaryCondition.py

@@ -371,3 +371,15 @@ class BoundaryCondition(SQLSubModel):
             d = self._data
             d[index], d[prev] = d[prev], d[index]
             self._status.modified()
+
+    def reach(self, river):
+        edges = []
+        if self._node != None:
+            if river != None:
+                for edge in river.edges():
+                    if edge.node1.name == self._node.name:
+                        edges.append(edge.reach)
+                    if edge.node2.name == self._node.name:
+                        edges.append(edge.reach)
+
+        return edges