Numerical Simulation of Unsteady Hyperconcentrated Sediment-Laden Flow in the Yellow River
Publication: Journal of Hydraulic Engineering
Volume 138, Issue 11
Abstract
The major obstacles to simulating flood flow in the Yellow River are its high sediment concentration, complex compound cross section, and rapid change in channel planform. This paper presents an improved one-dimensional numerical model that takes into account the effect of sediment concentration and bed change on mass and momentum conservation of flood flow in the Yellow River. The model is calibrated and then validated by simulating three individual flood events. Results show that an increase in sediment concentration leads to a reduction in flood wave celerity and peak discharge. The generalized likelihood uncertainty estimation (GLUE) method is used to evaluate the uncertainty of modeling results. A sensitivity index, analogous to the Nash–Sutcliffe efficiency factor, is adopted to quantify the sensitivity of calibration parameters. The modeling results are sensitive to the choice of Manning’s roughness coefficient and the empirical recovery coefficient for suspended sediment transport at reaches of transitional channel planform.
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Acknowledgments
The authors are grateful to constructive comments provided by anonymous reviewers; the Associate Editor also provided invaluable suggestions to improve the paper. The authors are grateful for research funding from the National Natural Science Foundation of China under Grant No. 50221903 and the China Ministry of Science and Technology under Grant No. 2007CB714106. Additional support for research supervision and manuscript writing was provided by U.S. National Science Foundation CAREER Award EAR-0846523.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 138 • Issue 11 • November 2012
Pages: 958 - 969
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Oct 11, 2008
Accepted: Mar 28, 2012
Published online: Mar 30, 2012
Published in print: Nov 1, 2012
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