Universal Bank Erosion Coefficient for Meandering Rivers
Publication: Journal of Hydraulic Engineering
Volume 115, Issue 6
Abstract
An equation for bank erosion, and thus channel migration rate, is derived theoretically from the equation of sediment continuity. The relation so derived lends credence to the hypothesis that bank erosion is proportional to a nearbank “excess” velocity, defined to be the difference between near‐bank and centerline depth‐averaged streamwise flow velocity. The theory also leads to the definition of a coefficient of bank erosion of a general nature. Based on data for channel shift for several Japanese rivers, it could be concluded that the universal erosion coefficient decreases as the index (number of blows) of the standard penetration test, as applied to the river bank, increases. Two trends appear, however, depending on whether or not bank texture is sandy or clayey.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 115 • Issue 6 • June 1989
Pages: 744 - 765
Copyright
Copyright © 1989 ASCE.
History
Published online: Jun 1, 1989
Published in print: Jun 1989
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