Low shear stress gravel-bed river
By: Robert T. Milhous
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Abstract
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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