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Predicting velocity frequency distributions in stream reaches

Abstract : The quantification of management impacts on fish populations requires a reliable estimation of the local hydraulic variability. In the case of complex natural flows, deterministic hydaulic models are expensive and not adapted to the description of local velocities. Statistical descriptions of the velocity distribution as a function of easily obtained input variables are therefore an attractive alternative. Existing velocity data on several French stream segments with intermediate -to largescale roughness were analysed statistically to define a shape parameter of the point velocity frequency distributions. Dimensional analysis was used to model this shape parameter, and thereby the velocity distributions, as a function of simple average descriptors of stream reaches (discharge, mean roughness, mean depth, and mean width). Such predictive models of the physical habitat availability for fish in the probability domain can provide stream managers with cost-effective tools.
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https://hal.inrae.fr/hal-02574054
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Submitted on : Thursday, May 14, 2020 - 4:12:21 PM
Last modification on : Thursday, March 4, 2021 - 10:22:03 AM

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  • HAL Id : hal-02574054, version 1
  • IRSTEA : PUB00000423

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N. Lamouroux, Yves Souchon, E. Herouin. Predicting velocity frequency distributions in stream reaches. Water Resources Research, American Geophysical Union, 1995, 31 (9), pp.2367-2375. ⟨hal-02574054⟩

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