Per capita sanitary flow

[MitchHeineman]

A sanitary sewer model can be easier to develop and understand if wastewater rates are specified using per capita values and population instead of directly specified flowrates. This can currently be achieved by creating a DWF pattern that identifies a per capita rate (e.g., 75E-6 mgd representing 75 gallons per capita per day) and specifying associated population equivalents instead of flow rates at model load points (e.g., 2000 people). A better paradigm would let the user choose whether to represent sanitary flows as absolute rates or via per capita values.

[In related veins, SWMM should allow dry weather flow specification using some of the methods found in similar software, such as allowing DWF to be associated with subcatchments rather than junctions and allowing multiple diurnal patterns to contribute to a single load point. Although I don't want to see unnecessary code bloat ;) ]

[dickinsonre]

I heartedly agree. I do have a blog with a workaround to use population and per capita flow but the real thing in a future SWMM5 would be better. https://www.linkedin.com/pulse/how-use-population-node-dwf-swmm5-infoswmm-instead-mean-dickinson/