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| General Listing |
Title of Listing: | | HEC-RAS: River Analysis System, Version l.1 |
Category: | | Software/Models |
Subcategory: | | Government, All Listings |
Date: | | |
Document #: | | PB96-501705INC |
Web Site: | | http://www.ntis.gov/fcpc/cpn7289.htm |
Email: | | info@fedworld.gov |
Abstract: | |
HEC-HAS is an integrated system of software, designed for interactive use in a multi-tasking, multi-user network environment. The system is comprised of a graphical user interface (GUI), separate hydraulic analysis components, data storage and management capabilities, graphics and reporting facilities. The HEC-RAS system is intended for calculating water surface profiles for steady gradually varied flow. The system can handle a full network of channels, a dendritic system, or a single river reach. HEC-RAS is capable of modeling subcritical, supercritical, and mixed flow regime water surface profiles. The basic computational procedure is based on the solution of the one-dimensional energy equation. Energy losses are evaluated by friction (Manning's equation) and contraction/expansion (coefficient multiplied by the change in velocity head). The momentum equation is utilized in situations where the water surface profile is rapidly varied. These situations include mixed flow regime calculations (i.e., hydraulic jumps), hydraulics of bridges, and evaluating profiles at river confluences (stream junctions). The effects of various obstructions such as bridges, culverts, weirs, and structures in the flood plain may be considered in the computations. The steady flow system is designed for application in flood plain management and flood insurance studies to evaluate floodway encroachments. Special features of the HEC-RAS include: multiple plan analyses; multiple profile computations; and multiple bridge and/or culvert opening analysis. |
Topics
Channels/Hydrology
Additional Topics/Tags/Keywords
Water Flow
Organization: | | National Technical Information Service (NTIS), Technology Administration, US Department of Commerce (DOC) |
Address: | | 5285 Port Royal Road
| Phone: | Description | Number |
City: | | Springfield | | Orders | (800) 553-6847 |
State/Province/Territory: | | VA | 2. | | (703) 487-4650 |
Zip/Postal Code: | | 22161 | 3. | Subject Content, US Army Corp of Engineers | (919) 756-1104 |
Country: | | United States | 4. | Fax: | (703) 321-8547 |
Branch Locations: | |
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