adapted FODE function in e-RK4 to (propably) be

able to handle negative outflux velocities
-> influx from pipeline

Ausgleichsbecken_class_file.py

@@ -67,6 +67,7 @@ class Ausgleichsbecken_class:
 
 
     def e_RK_4(self):
+        # Update to deal with non constant pipeline pressure!
         yn = self.outflux/self.area_outflux
         h = self.level
         dt = self.timestep