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《Engineering Journal of Wuhan University》 2013-01
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Numerical modeling of sedimentation process in Yantan Reservoir

DENG Chunyan,WU Weimin,XIA Junqiang(State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China)  
With the operation of a reservoir in a sediment-laden river,the rising of water level and decreasing of velocity in the reservoir result in the significant deposition of sediment transported from upstream,which directly threatens the reservoir lifespan and the safety of dam.A one-dimensional steady model of flow and nonuniform sediment transport is applied to simulate the sedimentation process over the period from 1994 to 1999 in the Yantan Reservoir located in the Hongshui River.The longitudinal bed profile and the accumulated deposition process of the main stream calculated by the model are compared with the measured data.The comparison shows that the calculated volume of sediment deposition is much less than the measured one with the regular parameters used.The effects of various parameter adjustments are then investigated,including the dry density,sediment transport capacity and recovery saturation coefficient.Based on the conditions of incoming sediment and deposition situation in the reservoir,the sedimentation process is simulated again with these key parameters being selected carefully;and the corresponding results are in close agreement with the observed values.
【Fund】: 国家自然科学基金面上项目(编号:51079103);; 教育部新世纪优秀人才项目(编号:NCET-10-0619)
【CateGory Index】: TV145
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