水科学进展2018，Vol.29Issue(1)：57-63,7.DOI:10.14042/j.cnki.32.1309.2018.01.007
深水库区细颗粒淤积物重力驱动流动数值模拟——以三峡水库为例
Numerical simulation of gravity-driven motion of fine-grained sediment deposits in large reservoirs: case study of the Three Gorges Reservoir
摘要
Abstract
Sediment deposition is one of the key issues during the processes of reservoir construction and operation.On the basis of the observed sedimentation patterns in the dam area of Three Gorges Reservoir (TGR),a schematic diagram of fine-grained particles sedimentation in the dam area was proposed.Critical slope was used to judge the incipient motion of the fine-grained deposits.It was assumed that the mass transport processes of fine-grained deposits were dominated by the shallow flow equations.A numerical method of gravity-driven motion of fine-grained deposits was developed and combining with a 3-D flow and sediment transport model.Then,the sedimentation patterns of finegrained particles in the dam area of the TGR were simulated by the developed method.The simulated results agreed well with the measured data.Sediment deposits in the dam area are mostly found at the bottom of the main channel,which have reshaped the river bed with a fiat surface that is nearly horizontal.In contrast,very little fine sediment deposits can be found on the bank slopes of the channel.The developed method can be applied to improve our understanding of fine sediment transport mechanisms in large reservoirs.关键词
深水库区/细颗粒淤积物/重力驱动/数值模拟Key words
large reservoirs/fine-grained sediment deposits/gravity-driven/numerical simulation分类
建筑与水利引用本文复制引用
假冬冬,周建银,邵学军,张幸农..深水库区细颗粒淤积物重力驱动流动数值模拟——以三峡水库为例[J].水科学进展,2018,29(1):57-63,7.基金项目
国家自然科学基金资助项目(51579151 （）
51779148)The study is financially supported by the National Natural Science Foundation of China (No.51579151 （）
No.51779148). （）
