Improved Hydraulic Features of the HEC River Analysis (HEC-RAS)

by Gary W. Brunner, Hydrologic Engineering Cent, Davis, United States,
Steven S. Piper, Hydrologic Engineering Cent, Davis, United States,

Document Type: Proceeding Paper

Part of: Hydraulic Engineering


The Hydrologic Engineering Center (HEC) is in the process of developing a Next Generation (NexGen) of hydrologic engineering software. The goal in the area of river hydraulics is to develop a River Analysis System (HEC-RAS) that can perform one-dimensional steady, unsteady, and sediment transport/movable boundary open channel flow calculations. A key element is that all computational engines (Steady, Unsteady, Sediment Transport) will use a common geometric data representation, and common geometric and hydraulic computation routines. Capabilities of existing software packages are to be carried foreword and new state-of-the-art algorithms added. The first version of HEC-RAS will allow for steady flow computations. Unsteady flow and sediment transport computations will be included in future versions. This paper presents some of the hydraulic features of HEC-RAS that have been improved on over our current steady flow model (HEC2).

Subject Headings: Hydraulic models | Sediment transport | Hydrologic engineering | Computer software | System analysis | River flow | Open channel flow

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