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swmm-gis - GIS and DEM preprocessing for SWMM

Preprocess QGIS/GRASS layers and DEMs for SWMM subcatchments, parameters, networks, entropy analysis, and packaged outputs.

Tags

Updated: 2026-10-05
SWMMGISQGISGRASSDEMwatershed delineationsubcatchmentsentropy analysishydrologygeospatial preprocessing

Capabilities

Validate GIS layer pathsValidate CRS consistencyNormalize GIS layersDelineate watershed subcatchments

Typical Inputs

QGIS/GRASS layersDEM rasterBoundary layer

Typical Outputs

Builder-ready CSVSubcatchment GeoJSONSWMM parameter CSVs

What this skill does

  • Validate GIS layer paths
  • Validate CRS consistency
  • Normalize GIS layers
  • Delineate watershed subcatchments
  • Compute entropy diagnostics
  • Rank entropy hotspots
  • Extract overlay attributes
  • Export SWMM intermediates
  • Package final GIS layers
  • Generate sensitivity figures

Inputs

  • QGIS/GRASS layers
  • DEM raster
  • Boundary layer
  • Land-use layer
  • Soil layer
  • Subcatchment GeoJSON
  • Network JSON
  • Delineation mode
  • Stream threshold
  • Entropy thresholds
  • CRS information

Outputs

  • Builder-ready CSV
  • Subcatchment GeoJSON
  • SWMM parameter CSVs
  • Network QA reports
  • Entropy ranking JSON
  • Sensitivity figures
  • GIS shapefiles
  • Slope raster
  • Overview image
  • Run manifests

Requirements

  • Installed Agentic SWMM project
  • aiswmm executable toolchain
  • QGIS with GRASS Processing
  • SWMM solver
  • Required sibling skills

Source

  • Spec: SKILL.md

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