Stormweir

Runoff, channels and storage

Purpose-Built

Civil stormwater workbench for Rational Method runoff, NRCS curve-number screening, detention routing, orifice/weir discharge, Manning channels, and storm scenarios.

Core Features

Rational and curve-number screens
Editable inflow/outflow routing
Orifice and storage metrics
Site-photo evidence

Private by Design

No account, subscription, ads, tracking, third-party analytics, or developer-operated backend. Core features work offline, and your work stays on device unless you deliberately share or export it.

Use It Responsibly

Hydraulic estimates are planning aids and do not predict flood safety. Verify survey data, rainfall criteria, local regulations, tailwater, blockage, and professional design review.