Low shear stress gravel-bed river



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A low stress gravel bed river is a river where the cross-sectional average dimensionless shear stress (??*) rarely exceeds 0.047. That is the case for the Gunnison River below Delta in Western Colorado. The cross-sectional average ??* in the Gunnison River has not exceeded 0.047, except at one cross section during one year, in the 87 years of record. A ??* of 0.047 is the critical ??* in the bed-load equation considered to be most applicable to gravel/cobble bed rivers (the Meyer-Peter, Mueller equation). According to this equation, there has been no bed-material movement in the Gunnison River since 1920; in fact there has been bed-material movement and this movement is biologically important. Bed-material is moved when the ??* is 0.016 or larger. Streamflows that cause a ??* of at least 0.016 maintain the aquatic habitat in a low shear stress river.
Publication type Conference Paper
Publication Subtype Conference Paper
Title Low shear stress gravel-bed river
Volume B pt 1
Year Published 1997
Language English
Publisher ASCE
Publisher location New York, NY, United States
Larger Work Title Proceedings, Congress of the International Association of Hydraulic Research, IAHR
First page 599
Last page 604
Conference Title Proceedings of the 1997 27th Congress of the International Association of Hydraulic Research, IAHR. Part D
Conference Location San Francisco, CA, USA
Conference Date 10 August 1997 through 15 August 1997
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