Role of Resistance Coefficient in Seasonal Adjustments in Alluvial Rivers
Publication: Journal of Hydraulic Engineering
Volume 129, Issue 11
Abstract
Using the river, canal, and flume data, it is found that the role played by the seasonal variation in the Manning rugosity coefficient, n, equalizes the sediment transporting capacity with sediment supply in the dune bed-form regime. Aggradation/degradation in a sand-bed river is thus avoided on a seasonal basis. A relation between the dimensionless rugosity coefficient and the dimensionless ratio of stream power to sediment concentration exists in sand-bed rivers for any specific gauge height. Once field measurements of the sediment transport rate are made and such a relationship is worked out, thereafter, it may be possible to estimate the sediment concentration for each observed flow discharge merely by applying this relationship adopting the data of velocity, depth, slope, and bed material size which are routinely observed at a stream-gauging site.
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References
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 129 • Issue 11 • November 2003
Pages: 915 - 918
Copyright
Copyright © 2003 American Society of Civil Engineers.
History
Received: Dec 19, 2001
Accepted: Apr 9, 2003
Published online: Oct 15, 2003
Published in print: Nov 2003
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