work on hydraulic structures window

src/Model/River.py

@@ -376,8 +376,8 @@ class River(Graph, SQLSubModel):
         return self._reservoir
 
     @property
-    def hydraulics_structures(self):
-        return self._hydraulics_structures
+    def hydraulic_structures(self):
+        return self._hydraulic_structures
 
     @property
     def parameters(self):