Choice of Percentiles and Axes to Determine Grain Resistance
Publication: Journal of Hydraulic Engineering
Volume 131, Issue 11
Abstract
Hydraulic and grain-size data were collected from 20 river sites to compare the ability of different percentiles to act as predictors of channel resistance. Grain sizes between the 91st and 100th percentile gave stronger correlations with roughness height than those between the 81st and 90th percentile. Contrary to previous research, it is suggested that a measure of the short axis of the grains gives significantly better estimates of resistance than the long or intermediate axes.
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Acknowledgments
Appreciation goes to Dr. and Mrs. R.G.C. Green for their assistance in the field and to Mr. R. Teg for provision of the current meter. Kevin White, Keith Richards, and David Graham gave constructive comments on earlier versions of this work.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 131 • Issue 11 • November 2005
Pages: 1007 - 1010
Copyright
© 2005 ASCE.
History
Received: Jul 23, 2003
Accepted: Jan 27, 2005
Published online: Nov 1, 2005
Published in print: Nov 2005
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