HEC-RAS is a software developed by the U.S. Army Corps of Engineers for modeling water flow in rivers and streams.
Best HEC-HMS Alternatives ranked by AI · updated May 2025
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HEC-HMS is a hydrologic modeling software also developed by the U.S. Army Corps of Engineers.
Price: Free
Top 6 HEC-HMS alternatives
GeoHECRAS is a software product used for advanced river modeling and floodplain mapping.
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Storm Water Management Model is a dynamic rainfall-runoff and hydraulic simulation tool for urban drainage, stormwater, and combined sewer systems. It is...
Pros
- Free and widely accepted for academic, consulting, and regulatory work
- Supports detailed urban runoff, conveyance, storage, pumps, and control modeling
- Open file format and extensive third-party ecosystem
Cons
- Less polished graphical workflow than commercial tools such as InfoWorks ICM
- Requires more manual setup and model checking than PCSWMM
- Limited integrated GIS, asset management, and collaboration features
4
HydroCAD is a computer-aided design tool used for modeling stormwater runoff and designing stormwater management systems.
5
Storm Water Management Model is a widely used software for simulating urban runoff and sewer systems.
Pros
- Open-source and actively developed
- User-friendly interface
Cons
- Less specialized for river hydraulics
- Limited pre-built hydraulic structures
6
FLO-2D is a comprehensive flood modeling software for two-dimensional flow analysis.
Pros
- Advanced two-dimensional modeling capabilities
- Good for floodplain mapping
Cons
- Costly for smaller projects
- Steeper learning curve compared to HEC-RAS
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