Research Article
Sep 1979
Estimating Average Velocity in Gravel-Bed Rivers
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VIEW THE REPLYPublication: Journal of the Hydraulics Division
Volume 105, Issue 9
Abstract
Basic data from 67 gravel-bed river reaches in Alberta, Canada, are used to test widely adopted equations for computing average velocity in natural channels for the case of relatively high in-bank flows. Relations proposed by Cowan, Strickler, and Limerinos to estimate Manning's n are tested. The equations of the form presented by Keulegan and Lacey for computing average velocity are also evaluated. Computations based on these methods indicate that the Limerinos-Manning equation is the most acceptable approach for estimating average velocity in gravel-bed river reaches. The Lacey equation provides satisfactory results if no bed material data are available. The basic data are also used to develop best-fit relationships for computing Manning's n and the friction factor for gravel-bed river reaches. Particular emphasis is placed on an evaluation of the significance of bed material data in equations used to compute average velocity in gravel-bed river reaches.
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Published In
Journal of the Hydraulics Division
Volume 105 • Issue 9 • September 1979
Pages: 1103 - 1122
Copyright
© 1979 American Society of Civil Engineers.
History
Published in print: Sep 1979
Published online: Feb 3, 2021
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Authors
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Dale I. Bray, M.ASCE
Prof. of Civ. Engrg., Univ. of New Brunswick, Fredericton, N.B., Canada
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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.
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.