Any suggestions on how to model a reclaimed water system that delivers water to multiple (bulk) storage ponds? Each pond has a level control and a pressure staining valve. Is there a way to simplify this model, I can't justify trying to model all the ponds and the levels? I've considered modeling the ponds as a demand based on approximate filling rates, but the rates can vary. Also, in a system with 15-20 bulk ponds, how do you decide which ponds are filling simultaneously for a steady state model? Another thought is to model the pressure staining valves at each pond and discharge to a reservoir and let the model solve the filling rate at each pond, but again do you assume all ponds are filling at the same time? or a percentage of the ponds??