Catchment area
I have a surface with a constant grade from north to south and from the sides in to the centre as you can see. The water will therefore fall towards the center and down the middle.
I have put a few manholes in the middle of the road to catch the water and want to do a catchment area for these different manholes. I have made an catchment area and put the manhole thats marked in the red circle as my refrence structure. Why is the catchment area further down the road than the manhole that is referenced? Shouldnt the catchment area show me the parts of the surface that leads to the refrenced structure? The water south of that manhole have no possibility to reach the refrenced structure?
