The HEC-RAS website provides a number of resources, which include helping the user download software, learn how to use HEC-RAS, resolve problems, report bugs, and suggest improvements to CEIWR-HEC products and service.

HEC-RAS has been developed for the U.S. Army Corps of Engineers (USACE). However, software developed at the Hydrologic Engineering Center is made available to the public whenever appropriate. Use is not restricted and individuals outside of USACE may use the program without charge.

The HEC-RAS Documentation Home Page is the most comprehensive source of documentation on HEC-RAS. The home page contains User's Manuals, Hydraulic References, Application Guides and more covering topics in 1D, 2D and sediment hydraulics. This documentation can also be accessed through the Help menu in HEC-RAS. HEC-RAS Release Notes

This document describes how to use HEC-RAS Mapper to do the following: establish a horizontal coordinate system; develop an HEC-RAS terrain model; layout the geometric data model and extract terrain data; visualize results in the form of maps, plots, and tables.

HEC-RAS is designed to perform one and two-dimensional hydraulic calculations for a full network of natural and constructed channels. The following is a description of the major capabilities of HEC-RAS. User Interface; Hydraulic Analysis Components; Data Storage and Management; Graphics and Reporting; RAS Mapper; User Interface

HEC-RAS Training page provides links to training materials including videos from lectures and webinars, and workshop material from training classes. HEC-RAS Guides and Tutorials HEC-RAS Webinars

The HEC-RAS 2025 mesh generation system has been completely redesigned. Gone are the days wasting hundreds of hours painstakingly moving cells, only to be met with fatigue and frustration. Breaklines enforce faces, period. From the inception of 2D modeling in HEC-RAS 5.0, meshes were cell-centric.

What does the future of HEC-RAS look like? Take a brief look at HEC-RAS 2025 Alpha https:/ … Advanced Meshing. This page assumes you're familiar with the basic mesh editing tools covered in our Quick S … Videos. Getting started with HEC-RAS 2025?

HEC-RAS Guides and Tutorials. Instruction and reference material for performing modeling tasks in HEC-RAS. Topics. Guides Downloading Terrain Data Creating an Combined 1D/2D Model Export Channel Data for Terrain Re-projecting Model Geometry ...

Using HEC-RAS to Compute Ungaged Lateral Inflows Viewing Results Cross Sections, Profiles, and Rating Curves