Water Science and Engineering 2011, 4(4) 431-444 DOI:   10.3882/j.issn.1674-2370.2011.01.007  ISSN: 1674-2370 CN: 32-1785/TV

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Taihu Basin
Taihu Lake
river network
water transfer
 rainfall-runoff model
1-D hydrodynamic numerical model
 cohesive sediment
ZHENG -gong
ZHANG Zhang-Kuan
ZUO Cheng-Biao
WU Wei-De
Article by Zheng,.G
Article by Zhang,Z.K
Article by Zuo,C.B
Article by Wu,W.D

Sediment transport following water transfer from   Yangtze River to Taihu Basin

Zheng GONG1, Chang-kuan ZHANG*1, Cheng-biao ZUO1, Wei-deng WU2

1. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, P. R. China
2. Laboratory of Ocean Dynamics, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, P. R. China


To meet the increasing need of fresh water and to improve the water quality of Taihu Lake, water transfer from the Yangtze River was initiated in 2002. This study was performed to investigate the sediment distribution along the river course following water transfer. A rainfall-runoff model was first built to calculate the runoff of the Taihu Basin in 2003. Then, the flow patterns of river networks were simulated using a one-dimensional river network hydrodynamic model. Based on the boundary conditions of the flow in tributaries of the Wangyu River and the water level in Taihu Lake, a one-dimensional hydrodynamic and sediment transport numerical model of the Wangyu River was built to analyze the influences of the inflow rate of the water transfer and the suspended sediment concentration (SSC) of inflow on the sediment transport. The results show that the water transfer inflow rate and SSC of inflow have significant effects on the sediment distribution. The higher the inflow rate or SSC of inflow is, the higher the SSC value is at certain cross-sections along the river course of water transfer. Higher inflow rate and SSC of inflow contribute to higher sediment deposition per kilometer and sediment thickness. It is also concluded that a sharp decrease of the inflow velocity at the entrance of the Wangyu River on the river course of water transfer induces intense sedimentation at the cross-section near the Changshu hydro-junction. With an increasing distance from the Changshu hydro-junction, the sediment deposition and sedimentation thickness decrease gradually along the river course.

Keywords Taihu Basin   Taihu Lake   river network   water transfer    rainfall-runoff model   1-D hydrodynamic numerical model    cohesive sediment  
Received 2011-02-25 Revised 2011-10-11 Online: 2011-12-30 
DOI: 10.3882/j.issn.1674-2370.2011.01.007
This work was supported by State Key Development Program of Basic Research of China (Grant No. 2010CB429001), the National Natural Science Foundation of China (Grant No. 51009062), and the Special Fund of Hydrology-Water Resources and Hydraulic Engineering (Grant No. 2009586812).
Corresponding Authors: Chang-kuan ZHANG
Email: ckzhang@hhu.edu.cn
About author:


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