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On Habitat Simulation in Mountain Rivers

by Robert T. Milhous, Natl Ecology Research Cent, Fort Collins, United States,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract:

Mountain rivers are quite different from other rivers and one of the characteristics that distinguish them from others is the large variation in velocities with time, with location in the river cross section and with depth. Aquatic animals in a mountain river are adapted to these large variations. This paper looks at the hydraulic aspects of a mountain river from the viewpoint of a habitat modeler. The model is the Physical Habitat Simulation System (PHABSIM) and whose objective is to simulate physical aquatic habitat as a function of stream flow. Hydraulic aspects taken into consideration are roughness calculation as a function of stream flow and the velocity simulation at river cross section. Equations formed can be used to determine the roughness variation with discharge.

Subject Headings: Rivers and streams | Mountains | Hydraulic roughness | Flow simulation | Hydraulic models | Fluid velocity | Streamflow

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