EPA SWMM
Gov-PublicVerified
The public-domain engine of urban drainage: dynamic-wave pipe networks, runoff, LID and water quality.
Urban Stormwater & InfrastructureActiveSWMMSewer Modelling
Generate SWMM inp (QGIS plugin)
ActiveBuild and read EPA SWMM models as QGIS layers — free GIS-based SWMM model construction.
- Pricing
- Open Source
- License
- GPL-3.0
- Commercial use
- Permitted
- Ecosystem
- QGIS, SWMM, Python
- Platform
- Windows, macOS, Linux
Install
QGIS → Plugins → Manage and Install Plugins → "Generate SWMM inp"About Generate SWMM inp (QGIS plugin)
Generate SWMM inp, by Jannik Schilling, closes the gap between QGIS and SWMM: it writes a complete SWMM input file from a set of QGIS layers (conduits, junctions, subcatchments, storage, pumps and the rest) and imports existing .inp models back into editable layers — so network geometry lives in the GIS, where editing, snapping and attribute tools are already good.
Paired with the free engine itself, it forms a zero-cost GIS-integrated SWMM workflow that covers much of what entry commercial GUIs charge for, and it has become the de facto QGIS answer for SWMM model building.
Where it fits in the workflow
TerrainCatchmentRainfallRunoffRoutingHydraulicsMappingReporting
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