Two-Dimensional Total Sediment Load Model Equations
Publication: Journal of Hydraulic Engineering
Volume 134, Issue 8
Abstract
An unsteady total load equation is derived for use in depth-averaged sediment transport models. The equation does not require the load to be segregated a priori into bed and suspended but rather automatically switches to suspended load, bed load, or mixed load depending on a transport mode parameter consisting of local flow hydraulics. Further, the sediment transport velocity, developed from available data, is explicitly tracked, and makes the equation suitable for unsteady events of sediment movement. The equation can be applied to multiple size fractions and ensures smooth transition of sediment variables between bed load and suspended load for each size fraction. The new contributions of the current work are the consistent treatment of sediment concentration in the model equation and the empirical definition of parameters that ensure smooth transitions of sediment variables between suspended load and bed load.
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Acknowledgments
The writers would also like to recognize the financial support of the Bureau of Reclamation Science and Technology Program under project number 0092.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 134 • Issue 8 • August 2008
Pages: 1142 - 1146
Copyright
© 2008 ASCE.
History
Received: Jul 18, 2006
Accepted: Aug 16, 2007
Published online: Aug 1, 2008
Published in print: Aug 2008
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