page_title: Storm Water Management Model
section_title: EPA stormwater calculator based on SWMM5
hierarchical_section_title: Storm Water Management Model / EPA stormwater calculator based on SWMM5
caption_attribution_description: English: A screen capture of the EPA Stormwater Calculator made by myself after downloading the software from the EPA. My wikilink is https://en.wikipedia.org/wiki/Storm_Water_Management_Model
context_page_description: The United States Environmental Protection Agency Storm Water Management Model is a dynamic rainfall–runoff–subsurface runoff simulation model used for single-event to long-term simulation of the surface/subsurface hydrology quantity and quality from primarily urban/suburban areas. It can simulate the Rainfall- runoff, runoff, evaporation, infiltration and groundwater connection for roots, streets, grassed areas, rain gardens and ditches and pipes, for example. The hydrology component of SWMM operates on a collection of subcatchment areas divided into impervious and pervious areas with and without depression storage to predict runoff and pollutant loads from precipitation, evaporation and infiltration losses from each of the subcatchment. Besides, low impact development and best management practice areas on the subcatchment can be modeled to reduce the impervious and pervious runoff. The routing or hydraulics section of SWMM transports this water and possible associated water quality constituents through a system of closed pipes, open channels, storage/treatment devices, ponds, storages, pumps, orifices, weirs, outlets, outfalls and other regulators.
context_section_description: Other external programs that aid in the generation of data for the EPA SWMM 5 model include:  SUSTAIN, BASINS,  SSOAP and the EPA’s National Stormwater Calculator (SWC) which is a desktop application that estimates the annual amount of rainwater and frequency of runoff from a specific site anywhere in the United States (including Puerto Rico). The estimates are based on local soil conditions, land cover, and historic rainfall records (Figure 5).
caption: Figure 5. The EPA stormwater calculator for simulating long-term runoff with LID and climate change.
exif: {}