I am trying to use WaterCAD to evaluate the benefit of having a tank mixing system vs. not, all else being equal. However, my results show the same water age whether the tank is "completely mixed" or "LIFO". Tanks are ground storage/standpipe. Should WaterCAD be able to compare the two options? If a mixing system is used, do I still input the same inactive volume for the portion of the tank that does not fill/drain?
Generally speaking WaterGEMS is not developed to accurately simulate tank mixing, rather it provides a some options to approximate a few generic scenarios.