Each of the areas contains its own fraction of pervious and impervious sub-areas. Spatial variability in all of these processes is achieved by dividing a study area into a collection of smaller, homogeneous sub-catchment areas. Nonlinear reservoir routing of overland flow.Percolation of infiltrated water into groundwater layers Interflow between groundwater and the drainage system.Infiltration of rainfall into unsaturated soil layers.Rainfall interception from depression storage.Time-varying rainfall (precipitation) and evaporation of standing surface water.Runoff reduction via green infrastructure practices.SWMM accounts for various hydrologic processes that produce runoff from urban areas, which include the following: Interflow between groundwater and the drainage system.Percolation of infiltrated water into groundwater layers.apply user-defined dynamic control rules to simulate the operation of pumps, orifice openings, and weir crest levels. Model various flow regimes, such as backwater, surcharging, reverse flow, and surface ponding.
Open Source SWMM: Community-Based Software Development for Stormwater Management Modeling
SWMM Reference Manual Volume III-Water Quality (Includes the LID Module references) SWMM Reference Manual Volume II-Hydraulics
SWMM Reference Manuals Errata (Volumes I and II)
SWMM Modeling Methods for Simulating Green Infrastructure at a Suburban Headwatershed: User's Guide
Source code for the SWMM 5.1.014 Graphical User Interface (ZIP) (zip) Source Code for the SWMM 5.1.014 Computational Engine (ZIP) (zip) Source code for the SWMM 5.1.015 Graphical User Interface (ZIP) (zip) Source Code for the SWMM 5.1.015 Computational Engine (ZIP) (zip) SWMM 5.1.015 Updates and Bug Fixes (TXT) (txt) Utility for converting SWMM 4 data files to SWMM 5 files (EXE) Version 1.2 (exe) Self-Extracting Installation Program for SWMM 5.1.014 (exe) Self-Extracting Installation Program for SWMM 5.1.015 (exe) SWMM 5 was produced in a joint development effort with CDM, Inc., a global consulting, engineering, construction, and operations firm. It is open source public software and is free for use worldwide. SWMM was developed to help support local, state, and national stormwater management objectives to reduce runoff through infiltration and retention, and help to reduce discharges that cause impairment of waterbodies. It can be used to evaluate gray infrastructure stormwater control strategies, such as pipes and storm drains, and is a useful tool for creating cost-effective green/gray hybrid stormwater control solutions. EPA and its employees do not endorse commercial products, services, or enterprises.ĮPA's Storm Water Management Model (SWMM) is used throughout the world for planning, analysis, and design related to stormwater runoff, combined and sanitary sewers, and other drainage systems. Disclaimer: Any mention of trade names, manufacturers, or products does not imply an endorsement by EPA.