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swmm-network

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Network QA of an existing INP (disconnected nodes, missing outfalls, adverse or zero slopes) is one call, network_qa, so call it first. Also builds, validates and routes SWMM pipe-network models from raw municipal shapefiles or structured GIS/CAD exports. Use when handling junctions, conduits, outfalls, xsections, network field-mapping configs, or wiring subcatchments to upstream nodes. Requires real pipe data as SHP / GeoJSON / CSV — native CAD (DXF/DWG) is not parsed and must first be exported to one of these. For data-scarce areas where only a bbox is available and no pipe inventory exists, use `swmm-anywhere` instead.

skills/swmm-network/SKILL.md

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# SWMM Network (pipe-system layer)

Part of [Agentic SWMM](https://github.com/Zhonghao1995/agentic-swmm-workflow) — install the project first for the executable toolchain (aiswmm CLI, SWMM solver, MCP servers).

## What this skill provides

- A stable JSON schema for SWMM drainage-network structure.
- Two complementary import paths:
  - **Raw municipal shapefile path** (`prepare_storm_inputs` → `infer_outfall` → `reorient_pipes` → `import_city_network` → `qa`) for typical city storm-pipe + manhole layers that arrive as bare LineString shapefiles.
  - **Structured asset-DB path** (`import_city_network` directly, or `import_network` for a fully field-mapped GeoJSON/CSV) when the source already contains explicit from/to nodes, inverts, and diameters.
- A subcatchment-to-network wiring step (`assign_subcatchment_outlets`) that ensures surface runoff actually enters the pipe network at a real upstream junction rather than dumping straight to the outfall.
- Topology / hydraulic-attribute QA (`qa`).
- Lightweight introspection (`summary`).
- Export from network JSON to core SWMM INP sections (`export_inp`).
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