AquaSWMM
EPA SWMM editor with 2D overland flow, 1D-2D coupling and sewer design
AquaSWMM (formerly StormSewer) is a desktop program for stormwater and storm-drain modeling. It edits EPA SWMM 5 models with full undo and runs them on EPA's own unmodified engine. Add 2D overland flow on a terrain grid, couple it to the pipe network (1D-2D), calibrate against observed data, and compare scenarios side by side.
Storm-sewer design is built in: Rational method, Manning capacity, standard-step HGL/EGL backwater and HEC-22 inlets, with auto-sizing and a submittal PDF. Imports Civil 3D .stm, LandXML, DXF, shapefiles, GeoJSON and GeoTIFF terrain.
Windows, macOS and Linux. ...