An important feature of HEC-RAS is the ability to import HEC-2 data. This feature makes it easy for a user to import existing HEC-2 data sets and start using HEC-RAS immediately. HEC-2 is a...

United States Army

In the past, for non-Corps users, HEC had provided a list of possible vendors for assistance or support for HEC software. As of 1 October 2008, HEC is no longer providing this list (Vendor...

The U.S. Army Corps of Engineers (USACE) Hydrologic Engineering Center's River Analysis System (HEC-RAS) computer program supersedes its HEC-2 computer program, which was widely used in the preparation of studies and restudies for …

Various routines are available for modifying input cross-section data, for example, for locating encroachments or inserting a trapezoidal excavation on cross sections. The water surface profile through structures such as bridges, culverts and weirs can be computed.

The most common methodology used to calculate flood elevations for a stream is a step-backwater computer program, such as HEC-2 or HEC-RAS. For more complex flooding situations, a computer program that models two-dimensional flow may be used.

HEC-RAS is a software that models the hydraulics of water flow through natural rivers and other channels. It is designed to perform one-dimensional and two-dimensional hydraulic calculations for a full network of natural or constructed channels, overbank, floodplain areas, etc.

For nearly 30 years, HEC-2 was probably the most widely used and accepted program worldwide for determination of water surface elevations. In 1993, the HEC introduced HEC-RAS (River Analysis System), the first version of their Windows based software for …

The program computers water surface profiles for one-dimensional steady, gradually varied flow in rivers of any cross section. Flow may be subcritical or supercritical. Various routines are available for modifying input cross-section data, for example, for locating encroachments or inserting a trapezoidal excavation on cross sections. The water surface profile through …

HEC-FDA Version 2.0 is a modern overhaul of the HEC-FDA software, with a complete re-write of the codebase.