PCSWMM
Commercial
CHI's commercial GIS front-end for SWMM — the most direct productivity upgrade for serious SWMM users.
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
Appears in collections
- The SWMM Ecosystem
The public-domain urban drainage engine and everything that grew around it.
Alternatives to Generate SWMM inp (QGIS plugin)
Ranked by the topics, categories and workflow stages they share with Generate SWMM inp (QGIS plugin).
Causeway Flow
Commercial
Storm and foul water drainage design and 1D hydraulic modelling software for UK and Irish civil engineers.
EPA SWMM
Gov-PublicVerified
The public-domain engine of urban drainage: dynamic-wave pipe networks, runoff, LID and water quality.
LocalSWMM
Open Source
Browser-based urban stormwater and drainage modeling powered by OpenSWMM 6 compiled to WebAssembly.
InfoWorks ICM
Commercial
Autodesk's integrated catchment model — the heavyweight for large sewer networks and coupled 2D flooding.
EPA SSOAP Toolbox
Gov-Public
EPA's toolbox for sanitary sewer overflow planning — RDII analysis with the SWMM engine underneath.