We have chosen the outfall to be in the middle of the circle and hexagonal sewage network. Yes of course, the topography should be first of all determined, this

We have chosen the outfall to be in the middle of the circle and hexagonal sewage network. Yes of course, the topography should be first of all determined, this is what we did in the Zaatari camp design. We used Global Mapper to find the elevations, then we determined the outlet (lowest point).