Friction Factor of Armored River Beds
Publication: Journal of Hydraulic Engineering
Volume 116, Issue 4
Abstract
Friction factors of armored river beds at the discharge that forms the armor coat are investigated. The analysis shows that the friction factor is rather independent of grain‐size distribution of the material forming the bed and the maximum grain size of this material. The major controlling parameter is the slope of the energy grade line. These unexpected results are explained by the coupling of the friction factor with the incipient motion problem and the rearrangement of the grains of the coarsest fraction in the armor coat. The difference between rounded and angular material is discussed. Field data collected in irrigation canals support the results obtained from laboratory experiments.
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References
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Information & Authors
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Published In
Journal of Hydraulic Engineering
Volume 116 • Issue 4 • April 1990
Pages: 531 - 542
Copyright
Copyright © 1990 ASCE.
History
Published online: Apr 1, 1990
Published in print: Apr 1990
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