HEC-RAS
FreeVerified
The world's most used hydraulic model: free 1D/2D river analysis, sediment, water quality and flood mapping.
Hydraulics & River SystemsActiveRiver Modelling2D Hydraulic Modelling
SRH-2D
ActiveThe US Bureau of Reclamation's free 2D river model — FHWA's preferred engine for bridge hydraulics.
by US Bureau of Reclamation
- Pricing
- Free
- License
- US Government (public domain)
- Commercial use
- Permitted
- Ecosystem
- SMS (Aquaveo)
- Platform
- Windows
About SRH-2D
SRH-2D (Sedimentation and River Hydraulics — 2D), developed by Yong Lai at the US Bureau of Reclamation, solves depth-averaged flow on flexible meshes with strong wetting-drying behaviour and sediment/mobile-bed capability. FHWA adopted it as the preferred 2D engine for bridge and culvert hydraulic design, which made it a fixture in US transportation projects.
The engine is free; in practice most users run it through Aquaveo's commercial SMS interface for mesh building and visualisation, which is the main cost consideration when comparing it against HEC-RAS 2D.
Where it fits in the workflow
TerrainCatchmentRainfallRunoffRoutingHydraulicsMappingReporting
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