Hydraulic resistance in alluvial channels

Yen, Ben Chie; Liou, Ying-Chang

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https://hdl.handle.net/2142/90170 Copy

Description

Title

Hydraulic resistance in alluvial channels

Author(s)

• Yen, Ben Chie
• Liou, Ying-Chang

Contributor(s)

University of Illinois at Urbana-Champaign

Issue Date

1969-07

Keyword(s)

• Water resources center
• Water resources center--Illinois
• Hydrology and hydraulics
• Alluvial channels
• Dimensional analysis
• Flow resistance
• Hydraulics
• Open-channel flow
• Sediment

Geographic Coverage

Illinois (state)

Abstract

An analytical study was conducted for the determination of the Weisbach resistance coefficient for flow in sand-bed straight channels. Available experimental data were reanalyzed based on dimensional analysis and fluid mechanics concepts. It was found that for flows having width to depth ratio greater than 5, there is a unique and systematic relationship among the Weisbach resistance coefficient f, the Froude number of the flow, and the sediment particle size to hydraulic radius ratio. The bed form which also is a dependent variable is also uniquely determined. For flow with Froude number less than 0.5 where its effect can be neglected, the resistance coefficient can be expressed as a function of the Reynolds number, sediment size to hydraulic radius ratio, and the sediment terminal fall velocity to shear velocity ratio. Application of the results for engineering purposes is also discussed. The technique for engineering applications of the results appear to be quite simple.

Publisher

University of Illinois at Urbana-Champaign. Water Resources Center

Type of Resource

text

Language

en

Permalink

http://hdl.handle.net/2142/90170

Sponsor(s)/Grant Number(s)

• U.S. Department of the Interior
• U.S. Geological Survey

Copyright and License Information

Copyright 1969 held by Ben Chie Yen, Ying-Chang Liou

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