AquaSWMM — running in your browser

The same validated Rust engine as the desktop app and CLI, compiled to WebAssembly. No server; nothing leaves your machine.

Quick calculators

Manning full-flow — n, slope, diameter (ft)

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Rational peak — C, i (in/hr), area (ac)

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Kirpich Tc — length (ft), slope

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Full network analysis (.ssn)

Analyze a network to see the report…

☕ Buy me a coffee

AquaSWMM engine (GPL-3.0-or-later) — free and open source. Build: cargo build -p aquaswmm-wasm --target wasm32-unknown-unknown --release then wasm-bindgen … --target web --out-dir wasm/pkg (see wasm/build.sh).

AquaSWMM manual · Methods · Source

Hand-check tables: Manning's n · runoff coefficients · time of concentration methods · storm sewer design criteria. From the same author: PE-Calc (free engineering calculators) · HydroComplete (stormwater design) · FloodTruth (AR dam-breach flood visualization).