Model:SWMM

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SWMM

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Summary Contact Technical specs In/Output Process Testing Other Component info Also known as Model type Single Model part of larger framework Note on status model Date note status model Incorporated models or components: Spatial dimensions 2D Spatial extent Landscape-Scale, Watershed-Scale, Reach-Scale Model domain Hydrology, Terrestrial One-line model description Storm Water Management Model Extended model description 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 that receive precipitation and generate runoff and pollutant loads. The routing portion of SWMM transports this runoff through a 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. Keywords: reaches, Name Lewis Rossman Type of contact Project manager Institute / Organization U.S. Environmental Protection Agency (EPA), Ground Water and Ecosystems Restoration Division Postal address 1 P.O. Box 1198 Postal address 2 Town / City Ada Postal code 74821-1198 State Oklahoma Country United States Email address rossman.lewis@epa.gov Phone (580) 436-8500 Fax Supported platforms Windows Other platform Programming language Other program language Code optimized Single Processor Multiple processors implemented Nr of distributed processors Nr of shared processors Start year development 1971 Does model development still take place? Yes If above answer is no, provide end year model development Code development status When did you indicate the 'code development status'? Model availability As code Source code availability (Or provide future intension) Through web repository Source web address http://www2.epa.gov/water-research/storm-water-management-model-swmm Source csdms web address Program license type Other Program license type other -- Memory requirements -- Typical run time -- Describe input parameters -- Input format Other input format Describe output parameters In addition to modeling the generation and transport of runoff flows, SWMM can also estimate the production of pollutant loads associated with this runoff. The following processes can be modeled for any number of user-defined water quality constituents: dry-weather pollutant buildup over different land uses pollutant washoff from specific land uses during storm events direct contribution of rainfall deposition reduction in dry-weather buildup due to street cleaning reduction in washoff load due to BMPs entry of dry weather sanitary flows and user-specified external inflows at any point in the drainage system routing of water quality constituents through the drainage system reduction in constituent concentration through treatment in storage units or by natural processes in pipes and channels Output format Other output format Pre-processing software needed? No Describe pre-processing software Post-processing software needed? No Describe post-processing software Visualization software needed? No If above answer is yes Other visualization software Describe processes represented by the model SWMM accounts for various hydrologic processes that produce runoff from urban areas. These include: time-varying rainfall evaporation of standing surface water snow accumulation and melting rainfall interception from depression storage infiltration of rainfall into unsaturated soil layers percolation of infiltrated water into groundwater layers interflow between groundwater and the drainage system nonlinear reservoir routing of overland flow. Describe key physical parameters and equations SWMM conceptualizes a drainage system as a series of water and material flows between several major environmental compartments. These compartments and the SWMM objects they contain include: The Atmosphere compartment, from which precipitation falls and pollutants are deposited onto the land surface compartment. SWMM uses Rain Gage objects to represent rainfall inputs to the system. The Land Surface compartment, which is represented through one or more Subcatchment objects. It receives precipitation from the Atmospheric compartment in the form of rain or snow; it sends outflow in the form of infiltration to the Groundwater compartment and also as surface runoff and pollutant loadings to the Transport compartment. The Groundwater compartment receives infiltration from the Land Surface compartment and transfers a portion of this inflow to the Transport compartment. This compartment is modeled using Aquifer objects. The Transport compartment contains a network of conveyance elements (channels, pipes, pumps, and regulators) and storage/treatment units that transport water to outfalls or to treatment facilities. Inflows to this compartment can come from surface runoff, groundwater interflow, sanitary dry weather flow, or from user-defined hydrographs. The components of the Transport compartment are modeled with Node and Link objects. Not all compartments need appear in a particular SWMM model. For example, one could model just the transport compartment, using pre-defined hydrographs as inputs. Describe length scale and resolution constraints -- Describe time scale and resolution constraints -- Describe any numerical limitations and issues -- Describe available calibration data sets Upload calibration data sets if available: Describe available test data sets Upload test data sets if available: Describe ideal data for testing Do you have current or future plans for collaborating with other researchers? Since its inception, SWMM has been used in thousands of sewer and stormwater studies throughout the world. Typical applications include: design and sizing of drainage system components for flood control sizing of detention facilities and their appurtenances for flood control and water quality protection flood plain mapping of natural channel systems (SWMM 5 is a FEMA-approved model for NFPI studies) designing control strategies for minimizing combined sewer overflows evaluating the impact of inflow and infiltration on sanitary sewer overflows generating non-point source pollutant loadings for waste load allocation studies evaluating the effectiveness of BMPs for reducing wet weather pollutant loadings. Is there a manual available? Yes Upload manual if available: Media:Epaswmm5 user manual.pdf Model website if any http://www.epa.gov/nrmrl/wswrd/wq/models/swmm/index.htm#Description Model forum / discussion board There is no formal support offered for EPA SWMM. A SWMM Users Listserve, established by the University of Guelph, allows subscribers to ask questions and exchange information. To subscribe, send an email message to listserv@listserv.uoguelph.ca with the words "subscribe swmm-users" (without the quotes) in the body followed by your name. Comments Model questionnaire filled out based on website, by Albert Kettner This part will be filled out by CSDMS staff OpenMI compliant No but possible BMI compliant No but possible WMT component No but possible PyMT component Is this a data component Can be coupled with:

Model info Authors Lewis Rossman Source code Go to external source code site Model citations Nr. of publications: 182 Total citations: 3532 h-index: 30 m-quotient: 0.59 QR-code Link to this page Other models by author SWMM

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Nr. of publications:	182
Total citations:	3532
h-index:	30
m-quotient:	0.59

Featured publication(s)	Year	Model described	Type of Reference	Citations
Rossman, L.A.; 2006. Storm Water Management Model Quality Assurance Report: Dynamic Wave Flow Routing.. EPA/600/R-06/097. (View/edit entry)	2006	SWMM	Model overview	0
Rossman, L.A.; 2010. Storm Water Management Model User’s Manual Version 5.0.. EPA/600/R-05/040. (View/edit entry)	2010	SWMM	Model overview	0
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