Research Article
Jul 1973
Extreme Roughness of Natural River Channel
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VIEW THE REPLYPublication: Journal of the Hydraulics Division
Volume 99, Issue 7
Abstract
The paper deals with the hydraulic design of a channel improvement scheme. Special attention is focused on the synthesis of the stage-discharge relationship for the downstream end of the improvement reach. In the absence of more directly applicable information, the design of the tail-water rating curve is based on the roughness characteristics of the river channel. The latter is deduced from a combination of high-water mark and flood flow which was recorded during the occurrence of a hurricane over the watershed. Results of a computer study are presented which suggest a Manning roughness coefficient of n = 0.225 for the channel reach under consideration. This value is larger than the corresponding predictions made on the basis of conventional methods for estimating n. The implications of this finding are explored relative to the configuration of the improvement scheme in the upstream channel.
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Published In
Journal of the Hydraulics Division
Volume 99 • Issue 7 • July 1973
Pages: 1027 - 1041
Copyright
© 1973 American Society of Civil Engineers.
History
Published in print: Jul 1973
Published online: Feb 3, 2021
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Hans J. Leutheusser, M.ASCE
Prof., Dept. of Mech. Engrg., Univ. of Toronto, Toronto, Ontario, Canada
W. Orville Chisholm, M.ASCE
Pres., W. O. Chisholm and Assocs. (Eastern) Ltd., Consulting Engrs., Scarborough, Ontario, Canada
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
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.
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.