水力发电学报2012，Vol.31Issue(3)：131-136,6.
挖粗沙减淤在三峡水库中的数值模拟研究
Numerical modeling of coarse sediment dredging for deposition reduction in Three Gorges reservoir
摘要
Abstract
Coarse sediment dredging（CSD） at a fixed basin is an applicable measure of reservoir desiltation.This paper presents a study of CSD process and its effects to reduce deposition in the Three Gorge reservoir by applying a model of unsteady flow and sediment transport.Calculations reveal that by clearing away the coarse sediment from a dredging basin of 10 km long located at the reservoir＇s backwater end,the volume of deposits accumulated during 100 years will be reduced from 17×109 to 14×109m3.A detailed analysis shows that the dredged backwater reach could collect and hold up most of the inflow coarse sediment and the desiltation effect of dredging extends from the dredging location to the whole reservoir through an adjustment process of riverbed slope,flow velocity,sediment transport capacity and deposition distribution.Thus,CSD at a fixed basin is a reliable method of high efficiency in reducing reservoir deposition.关键词
河流泥沙工程学/水库挖沙/数学模型/三峡水库/粗沙Key words
river sediment engineering/dredging/modeling/Three Gorges reservoir/coarse sediment分类
建筑与水利引用本文复制引用
曹慧群,周建军..挖粗沙减淤在三峡水库中的数值模拟研究[J].水力发电学报,2012,31(3):131-136,6.基金项目
国家自然科学基金项目 （）
