Sediment Transport in River Models with Overbank Flows
Publication: Journal of Hydraulic Engineering
Volume 132, Issue 1
Abstract
Some laboratory sediment-transport experiments are described in which a compound channel with a mobile-bed composed of uniform sand with a of was subjected to overbank flows. The main river channel was monitored to determine the effect of floodplain roughness on conveyance capacity, bed-form geometry, resistance, bed-load transport, and dune migration rate. The floodplain roughness was varied to simulate a wide range of conditions, commensurate with conditions that can occur in a natural river. For a given discharge, the main river channel bed was found to adjust itself to a quasi-equilibrium condition governed by the lateral momentum transfer between the floodplain and main channel flows and the local alluvial resistance relationship appropriate for the proportion of total flow in the main river channel. The sediment transport rate was found to reflect all these influences. The data are summarized in equation form for comparison with other experimental studies and for checking numerical river simulation models.
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Acknowledgments
The writers acknowledge the support of the Engineering and Physical Sciences Research Council, EPSRC, who sponsored this research through grant GR/M41797/01. They also wish to thank Dr. Serter Atabay, former researcher at the University of Birmingham, who participated in this research program.
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Information
Published In
Journal of Hydraulic Engineering
Volume 132 • Issue 1 • January 2006
Pages: 77 - 86
Copyright
© 2006 ASCE.
History
Received: Mar 1, 2004
Accepted: Jan 19, 2005
Published online: Jan 1, 2006
Published in print: Jan 2006
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