3D Numerical Simulation for Water Flows and Sediment Deposition in Dam Areas of the Three Gorges Project
Publication: Journal of Hydraulic Engineering
Volume 135, Issue 9
Abstract
This paper presents a three-dimensional (3D) mathematical model for suspended load transport in turbulent flows. Based on the stochastic theory of turbulent flow proposed by Dou, numerical schemes of Reynolds stresses for anisotropic turbulent flows are obtained. Instead of a logarithmic law, a specific wall function is used to describe the velocity profile close to wall boundaries. The equations for two-dimensional suspended load motion and sorting of bed material have been improved for a 3D case. Numerical results are in good agreement with the measured data of the Gezhouba Project. The present method has been employed to simulate sediment erosion and deposition in the vicinity of the Three Gorges Dam. The size distribution of the deposits and bed material, and flow and sediment concentration at different times and elevations, are predicted. The results agree well with the observations in physical experiments. Thus, a new method is established for 3D simulation of sediment motion in the vicinity of dams.
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Acknowledgments
The project is financially supported by the National Basic Research 973 Program of China (Grant No. UNSPECIFIED2003CB415206) and the National Natural Science Foundation of China (Grant No. NNSFC50879047), and the “Ninth 5-year Plan” TGP engineering sediment problem fundamental research grant (Grant No. UNSPECIFIED95-3-3). The writers benefited greatly from stimulating discussions with Dr. Longxi Han, Yan Lu, Xianghua Yang, Liqin Zuo, and Rongyao Ji.
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Published In
Journal of Hydraulic Engineering
Volume 135 • Issue 9 • September 2009
Pages: 755 - 769
Copyright
© 2009 ASCE.
History
Received: Aug 24, 2006
Accepted: Apr 24, 2009
Published online: Aug 14, 2009
Published in print: Sep 2009
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