Estimate open-channel flow and WSL from DEM cross-sections, design-channel shapes, and manual/custom XS profiles.
- Estimate Q or WSL using Manning's equation from DEM, design-channel, or manual/custom XS inputs.
- Sample DEM cross-sections from a user-drawn line and report A, P, R, velocity and freeboard.
- Use SI and US units for common hydraulic inputs, outputs and profile checks.
- Use rectangular, trapezoidal, V-shape, half-circular, Manual XS and saved custom XS profiles.
- Support optional local Manning's n values and bank extension above the defined profile.
- Plot profile, WSL, wetted area, wetted perimeter, crest and freeboard checks.
- Copy or export visible profile/plot values for quick QA and reporting.
This tool is part of QFAT (QGIS Flood Analysis Toolkit) — a set of focused QGIS utilities designed to support flood modelling workflows (e.g., TUFLOW, HEC-RAS), hydraulic QA, and rapid engineering checks.
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