SRH-2D — 2D Flow and Sediment Transport Model
U.S. Bureau of Reclamation
A two-dimensional model for flow in streams and rivers, developed by the US Bureau of Reclamation with the FHWA and Taiwan’s Water Resources Agency. Unlike a one-dimensional model that assumes an averaged cross-section, it solves the velocity field in plan — so it suits cases where flow is not parallel to the channel: bridge contractions, bypasses, floodplains and tributary junctions. It includes multi-size sediment transport with bed level changing over time, and handles subcritical, supercritical and transcritical flow. It complements HEC-RAS: where one dimension is enough, HEC-RAS does the job; SRH-2D comes in when spatial detail is needed.
Ratings & Reviews
| Licence type | Completely Free |
|---|---|
| Licence terms | US government software. Free download, no payment and no registration. The model itself is free; mesh building and result display are usually done in the SMS interface, which is a separate commercial product. |
| Platforms | Windows |
| Engineering field | Civil Engineering, Environmental & Water |
| Tool type | Computational Fluid Dynamics, Simulation & FEA |
| Version checked | 3.3.1 |
| Vendor site | www.usbr.gov |
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Last verified: 2026-09-16
