Bed-Load Transport Flume Experiments on Steep Slopes
Publication: Journal of Hydraulic Engineering
Volume 134, Issue 9
Abstract
Experiments were conducted over uniform gravel bed materials to obtain 143 friction factor values under bed-load equilibrium flow conditions in an attempt to add to the scarce data available on slopes between 1 and 9% for Shields numbers between 0.08 and 0.29. Analyses showed that when only flows over flat beds are considered, a distinction must be made between flows with and without bed load. More particularly, fitting flow resistance equations indicated that the roughness parameter increases by a factor of 2.5 from clear water flow to intense bed-load transport. Between these two states, the flow resistance can be approximated by a constant for a given slope.
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Acknowledgments
This study was supported by the Cemagref and funding was provided by the Programme National Risque Hydrologique (ANR/INSU/ECCO). The authors are grateful to the TSI laboratory of Saint Etienne (Christophe Ducottet, Nathalie Bochard, Jacques Jay, and Jean-Paul Schon).
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 134 • Issue 9 • September 2008
Pages: 1302 - 1310
Copyright
© 2008 ASCE.
History
Received: Feb 9, 2006
Accepted: Jan 30, 2008
Published online: Sep 1, 2008
Published in print: Sep 2008
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