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Versatile Methodology for Flow Depth and Velocity Modeling in Stream Aquatic Habitat Assessment

by Krishan Singh, Illinois State Water Survey, Champaign, IL, USA,
Sally McConkey Broeren, Illinois State Water Survey, Champaign, IL, USA,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract:

The habitat assessment methodology developed by the IFG Instream Flow Group is a useful tool for evaluating instream flow needs. The methodology for basin flow modeling developed in this study broadens the scope of applications of the IFIM (Instream Flow Incremental Methodology). The hydraulic geometry relations and the adjustment factors are an essential part of the flow model and are an effective means of predicting average parameter values for unmeasured streams. The depth and velocity distribution models determined from the field data provide the necessary information on local variations in depth and velocity to evaluate the stream habitat. The basinwide flow model, interfaced with the habitat suitability information, may be used to evaluate the aquatic habitat of any stream in a basin for any discharge scenario.

Subject Headings: Streamflow | Rivers and streams | River flow | Basins | Aquatic habitats | Velocity distribution | Fluid velocity

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