FREE SOFTWARE

 5 U. S. Army Corps of Engineers

• HEC-RAS (River Analysis System )

• HEC-GeoRas (for processing geospatial data in ArcGIS )

• HEC-HMS (Hydrologic Modeling System )

• HEC-GeoHMS (Geospatial Hydrologic Modeling Extension )

• HEC-ResSim (Reservoir System Simulation program)

• HEC-FDA (Flood Damage Analysis)

• HEC-DSS (Data Storage System)

• CWMS (Corps Water Management System)

U. S. Environmental Protection Agency

 5 EPANET (Water Supply)

 5 EPASWMM (Stormwater Management Model)

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