Chapter
Apr 26, 2012
New Floodplain Delineation Capabilities in HEC-RAS
Authors: Cameron T. Ackerman [email protected], Mark R. Jensen [email protected], and Gary W. Brunner [email protected]Author Affiliations
Publication: World Environmental and Water Resources Congress 2009: Great Rivers
Abstract
The Hydrologic Engineering Center's River Analysis System (HEC-RAS) is widely used for computing water surface elevations with results processed using GIS to determine inundation extent and flood depths. These floodplain boundary and flood depth results are used to establish flood insurance rate maps, analyze severe flood events, establish emergency action plans, estimate flood damage losses, and evaluate habitat restoration alternatives. New floodplain delineation tools in HEC-RAS provide the capability to develop inundation maps utilizing water surface profile results and a model of the ground surface. This delineation capability allow the modeler to visualize the resulting floodplain directly within HEC-RAS, providing a more efficient environment for hydraulic model refinement than processing results in GIS. The resulting floodplain boundary and flood depths may then be used in other modeling software to evaluate floodplain impacts.
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© 2009 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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P.E., D.WRE
Hydrologic Engineering Center, Institute for Water Resources, U.S. Army Corps of Engineers, 609 2nd St., Davis, CA 95616. E-mail: [email protected]
Hydrologic Engineering Center, Institute for Water Resources, U.S. Army Corps of Engineers, 609 2nd St., Davis, CA 95616. E-mail: [email protected]
P.E.
Hydrologic Engineering Center, Institute for Water Resources, U.S. Army Corps of Engineers, 609 2nd St., Davis, CA 95616. E-mail: [email protected]
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