Effect of Bed Sediment Entrainment on Debris-Flow Resistance
Publication: Journal of Hydraulic Engineering
Volume 140, Issue 1
Abstract
Entrainment of sediment from hillslope and channel usually has a significant influence on resistance of debris flow. This effect is studied by flume experiments of debris flow over rigid and erodible beds. Fifty contrast flume tests show that the flow resistance over the erodible bed is significantly larger than that over the rigid bed because of higher energy consumption resulting from sediment transport. A new formula of debris-flow resistance involving the entrainment effect is obtained from the erodible-bed data by nondimensional multiple regression analysis.
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Acknowledgments
This work has been funded by the Key Research Program of the Chinese Academy of Sciences (Grant No. KZZD-EW-05-01), the National Basic Research Program of China (973 Program) (Grant No. 2011CB409902), and the Hundred Young Talents Program of the Institute of Mountain Hazards and Environment. The authors thank the Dongchuan Debris Flow Observation and Research Station, CAS, for providing the laboratory and experimental setup. Special thanks are due to Professor Yong Li for his careful revision.
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Information & Authors
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Published In
Journal of Hydraulic Engineering
Volume 140 • Issue 1 • January 2014
Pages: 115 - 120
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Dec 22, 2012
Accepted: Jul 17, 2013
Published online: Dec 16, 2013
Published in print: Jan 1, 2014
Discussion open until: May 16, 2014
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