Method for Estimating Sediment Transport in Ice-Covered Channels
Publication: Journal of Cold Regions Engineering
Volume 14, Issue 3
Abstract
A method is proposed for estimating rates of sediment transport in ice-covered alluvial channels. The method extends existing, open-water procedures for estimating rates of sediment transport to conditions of ice-covered flow. A key aspect of the method is the assessment of flow resistance attributable to bed-surface drag. That assessment is used to estimate rates of bed load and suspended load, and thereby total bed-sediment transport rate. Estimation of ice-covered suspended load additionally entails an approximation whereby open-water suspended load is scaled in proportion to the ratio of a reference sediment concentration for ice-covered flow relative to that for open-water flow. The reference concentration is calculated in terms of bed-load rate and shear velocity attributed to bed-surface drag. Flume data are used to develop the method and tentatively verify it. Field verification of the method presently is hampered by the absence of field data on bed sediment transport in ice-covered channels.
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Information & Authors
Information
Published In
Journal of Cold Regions Engineering
Volume 14 • Issue 3 • September 2000
Pages: 130 - 144
History
Received: Apr 7, 1999
Published online: Sep 1, 2000
Published in print: Sep 2000
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