Research Article
Mar 1974
Factors Determining Bed Forms of Alluvial Streams
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VIEW THE REPLYPublication: Journal of the Hydraulics Division
Volume 100, Issue 3
Abstract
Based on the analysis of laboratory and field data according to similarity methods, it is found that the following variables are important in determining the bed forms of sand bed streams: flow depth d and mean velocity, V, density, ρ, and viscosity, ν, of the water; median size of sediment d50 and the acceleration of gravity, g. The data thus analyzed are presented in six graphs of d/d50 against Froude number F for each of six ranges of Rg = d50 (gd50)¹/²/ν which accounts for the effects of sediment size and water viscosity or temperature. Flume data indicate that the size distribution of the bed sediment also affects bed form, but the extent of this effect could not be determined. The effect of grain shape and channel width could not be determined with the available data. A relation is developed between Rg and u⋆( gd50)¹/² which predicts quite well the occurrence of ripple and dune beds in which ⋆ = shear velocity.
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Published In
Journal of the Hydraulics Division
Volume 100 • Issue 3 • March 1974
Pages: 363 - 377
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© 1974 American Society of Civil Engineers.
History
Published in print: Mar 1974
Published online: Feb 3, 2021
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Authors
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Vito A. Vanoni, F.ASCE
Prof. of Hydr., w. M. Keck Lab. of Hydr. and Water Resources, California Inst. of Tech., Pasadena, Calif
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
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