泥沙研究2017，Vol.42Issue(4)：1-8,8.DOI:10.16239/j.cnki.0468-155x.2017.04.001
三峡水库蓄水后重庆河段冲淤特性研究
Study on scour and deposition characteristics in Chongqing Reach after Three Gorges Reservoir Operation
摘要
Abstract
Based on the convergent flow ratio of the Jialingjiang River to Yangtze River,and changes of water flow and sediment transport,the deposition ratio formulas are derived.Erosion-deposition characteristics dur ing the different period are analyzed based on water and sediment continuous principle and sediment transport characteristics in the Chongqing Reach.The river deposition ratio has an important relationship between the convergent flow ratio of the Jialingjiang River and the discharge at the Cuntan Station.Scour and deposition characteristics of the Chongqing Reach during the initial stage of the TGR operation is similar to that before theTGR operation with the deposition during the flood period and erosion during the dry season.Scour and deposi tion characteristics in the Chongqing Reach have changed since the TGR experimental operation period in 2003 -2008.In the storage period after flood period and the fall period before flood period,accumulate deposition will occur in spite of alternate erosion-deposition in the reach.In the flood period,the scour and deposition will also occur with a total small deposition,even erosion.At the same time,river sand excavation optionally has a serious impact on scour and deposition in the Chongqing City Reach.关键词
重庆河段/三峡水库蓄水/河段冲淤变化/淤积比/汇流比Key words
Chongqing reach/TGR operation/reach erosion and deposition variation/deposition ratio/convergent flow ratio分类
建筑与水利引用本文复制引用
王延贵,曾险,苏佳林,史红玲..三峡水库蓄水后重庆河段冲淤特性研究[J].泥沙研究,2017,42(4):1-8,8.基金项目
国家十二五科技支撑计划项目专题(2012BAB04B02-2) （2012BAB04B02-2）
国家自然科学基金项目(51679259,51179208) （51679259,51179208）
