SWMM is a physically-based, distributed, unsteady, continuous urban stormwater runoff quantity and quality model. The model is used in (i) designing and sizing drainage system components, including detention facilities; (ii) to generate non-point source pollutant loadings for TMDL studies; (iii) to evaluate BMP and LID stormwater controls to meet sustainability goals; – (iv) to alleviate combined and sanitary sewer overflows; and (v) to control flooding of urban areas and natural channel systems. SWMM uses hourly or more frequent rainfall data as input and can be run for single events or in continuous fashion for any number of years.

Description: SWMM.pdf              Website: https://www.epa.gov/water-research/storm-water-management-model-swmm