Overbank Flow in Compound Channels with Nonprismatic Floodplains
Publication: Journal of Hydraulic Engineering
Volume 137, Issue 8
Abstract
In this paper, the authors present experimental results of overbank flow in compound channels with nonprismatic floodplains and different convergence angles. The depth-averaged velocity, the local velocity distributions, and the boundary shear stress distributions were measured along the converging flume portion for different relative depths. The momentum balance is used to analyze the force acting on the flow in the main channel and for the whole cross section. Using the experimental data, various terms in the momentum equation are also calculated. The apparent shear forces on the vertical interface between the main channel and floodplains are evaluated for compound channels with nonprismatic floodplains, and the results are then compared with the prismatic cases. The energy balance in nonprismatic compound channels is also investigated by using the water surface elevation.
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Acknowledgments
The first author would like to gratefully acknowledge the generous financial support of the Iranian Ministry of Science, Research, and Technology; Bu-Ali Sina University; and Mike Vanderstam, technician in the hydraulics laboratory, for his expert technical work with the experimental apparatus.
References
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 137 • Issue 8 • August 2011
Pages: 815 - 824
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Aug 9, 2009
Accepted: Nov 18, 2010
Published online: Nov 22, 2010
Published in print: Aug 1, 2011
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