Maximum Migration Distance of Meander Channel in Sand Using Hyperbolic Function Approach
Publication: Journal of Hydraulic Engineering
Volume 135, Issue 8
Abstract
A set of large-scale laboratory experiments were conducted to study the migration of meandering channel. Factors affecting the change of banklines, including the ratio of centerline curvature to channel width, bend angle, and Froude number were tested in the experiments. The effect of each factor on the evolution of channel plan form was evaluated and quantified. The channel bankline displacement was modeled by a hyperbolic function with the inclusion of the initial migration rate and the maximum migration distance. A three-dimensional numerical model was also employed to explain some findings in the laboratory tests. It is found that the maximum migration distance along a bend satisfies a Gaussian distribution. A set of equations were developed for predicting the maximum migration distance. With the maximum migration distance being developed as a function of several geometric and flow parameters, a hyperbolic-function model can be applied to estimate the maximum bankline migration distance when the channel reaches equilibrium.
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Acknowledgments
The writers wish to thank the financial support provided by the Texas Department of Transportation (TX DOT) under the project entitled “Establish guidance for soils properties-based prediction of meander migration rate.” The help of Mr. Tom Dahl (TX DOT), Mr. David Stolpa (TX DOT), and Dr. Wei Wang (Mustang Engineering) is greatly appreciated.
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Published In
Journal of Hydraulic Engineering
Volume 135 • Issue 8 • August 2009
Pages: 629 - 639
Copyright
© 2009 ASCE.
History
Received: Nov 13, 2006
Accepted: Dec 30, 2008
Published online: Feb 6, 2009
Published in print: Aug 2009
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