Near-Bed Sediment Concentration Distribution and Basic Probability of Sediment Movement
Publication: Journal of Hydraulic Engineering
Volume 137, Issue 10
Abstract
Sediment concentration distribution and the basic probability of sediment movement near the channel bed are two of the most important and fundamental issues in the study of sediments. Based on statistical analysis and considering the transport mechanisms, the rules of sediment concentration distribution near a channel bed are studied. Analytical expressions for the near-bed sediment concentration distribution and mean sediment concentration are derived, and the expression for the mean sediment concentration near the bed is verified by measured data, which were obtained from previous experiments. With the help of statistical theory, the expressions of basic probabilities, i.e., rolling, saltating, and suspending probabilities, for sediment movement near the bed are also derived. The expression for starting probability is verified by the measured data. The verification shows that the results from the proposed expression agree well with the measured data. This research has both theoretical and practical significance for further investigation concerning rules of bed load and suspended sediment transport.
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Acknowledgments
This research was financially supported by the National Science Fund for Distinguished Young Scholars (UNSPECIFIED50725930) and Science Fund for Creative Research Groups (UNSPECIFIED51021006).
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 137 • Issue 10 • October 2011
Pages: 1269 - 1275
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Sep 22, 2009
Accepted: Dec 17, 2010
Published online: Dec 20, 2010
Published in print: Oct 1, 2011
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