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The HEC-RAS team is excited to announce the public release of the RAS 2025 Alpha! This is a full software rewrite that has been in the works for over 5 years. We wanted to re-design the product with a modern look and feel, improved modeling tools, and fast multi-core performance for the next generation of GIS data needs. Take a look at our launch website for more.

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The Hydrologic Engineering Center's (HEC) River Analysis System (HEC-RAS) software allows you to perform one-dimensional steady and 1D and 2D unsteady flow river hydraulics calculations. HEC-RAS is an integrated system of software, designed for interactive use in a multi-tasking, multi-user network environment.

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The Regime Prescription Tool (HEC-RPT) helps groups of water managers, scientists, and stakeholders formulate water management alternatives. HEC-RPT is typically applied in real-time settings and contributes in the early stages of plan formulation, synthesizing ideas and expert knowledge into alternatives that are easily visualized and considered in other software.

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The Reservoir System Simulation (HEC-ResSim) software developed by the U.S. Army Corps of Engineers, Institute for Water Resources, Hydrologic Engineering Center (CEIWR-HEC) is used to model reservoir operations at one or more reservoirs for a variety of operational goals and constraints.

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GeoEFM performs spatial analyses to help inform ecosystem restoration and water management activities, especially: 1) computation and comparisons of habitat areas and 2) assessment of habitat functionality via consideration of habitat quality, connectivity, and distribution.