Storm Water Management Model (SWMM)

Resource type: Model Program Resource
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Created: Jun 03, 2015 at 7:17 p.m.
Last updated: Jun 30, 2017 at 3:29 a.m.
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The EPA Storm Water Management Model (SWMM) is a dynamic rainfall-runoff simulation model used for single event or long-term (continuous) simulation of runoff quantity and quality from primarily urban areas. The runoff component of SWMM operates on a collection of subcatchment areas on which rain falls and runoff is generated. The routing portion of SWMM transports this runoff through a conveyance system of pipes, channels, storage/treatment devices, pumps, and regulators. SWMM tracks the quantity and quality of runoff generated within each subcatchment, and the flow rate, flow depth, and quality of water in each pipe and channel during a simulation period comprised of multiple time steps. SWMM was first developed back in 1971 and has undergone several major upgrades since then. The current edition, Version 5, is a complete re-write of the previous release. Running under Windows, EPA SWMM 5 provides an integrated environment for editing drainage area input data, running hydraulic and water quality simulations, and viewing the results in a variety of formats. These include color-coded drainage area maps, time series graphs and tables, profile plots, and statistical frequency analyses.

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Computational Engine

Programming Language C
Operating System Windows XP, 7
Version 5.1.010


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People or Organizations that contributed technically, materially, financially, or provided general support for the creation of the resource's content but are not considered authors.

Name Organization Address Phone Author Identifiers
Michael Gregory Camp Dresser & McKee Inc.
Dennis Lai United States Environmental Protection Agency
Wayne Huber Oregon State University

How to Cite

Rossman, L., T. Schade, D. Sullivan, R. Dickinson, C. Chan, E. Burgess (2017). Storm Water Management Model (SWMM), HydroShare,

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