Index: wflow-py/wflow/wflow_sbm.py
===================================================================
diff -u -r2e4b13843097b6d76d6b830c4a1df423225b9cfd -r5cacddfd21cdead17aba383f99a8987e480f141c
--- wflow-py/wflow/wflow_sbm.py	(.../wflow_sbm.py)	(revision 2e4b13843097b6d76d6b830c4a1df423225b9cfd)
+++ wflow-py/wflow/wflow_sbm.py	(.../wflow_sbm.py)	(revision 5cacddfd21cdead17aba383f99a8987e480f141c)
@@ -1469,7 +1469,7 @@
         ##########################################################################
 
         self.QCatchmentMM = self.SurfaceRunoff * self.QMMConvUp
-        self.RunoffCoeff = self.QCatchmentMM/catchmenttotal(self.PrecipitationPlusMelt, self.TopoLdd)/catchmenttotal(cover(1.0), self.TopoLdd)
+        self.RunoffCoeff = cover(self.QCatchmentMM/catchmenttotal(self.PrecipitationPlusMelt, self.TopoLdd),self.ZeroMap)
         #self.AA = catchmenttotal(self.PrecipitationPlusMelt, self.TopoLdd)
         #self.BB = catchmenttotal(cover(1.0), self.TopoLdd)
         # Single cell based water budget. snow not included yet.