水利学报2018，Vol.49Issue(1)：36-46,11.DOI:10.13243/j.cnki.slxb.20170827
水库群联合作用下长江中下游江湖关系响应机制
Response mechanism of the river and lakes in the middle and lower reaches of the Yangtze River under the combined effect of reservoir groups
摘要
Abstract
The total capacity of group reservoirs alongthe Yangtze River and its tributaries is about 37.6 ％ of the annual runoff of the Yangtze River.The combination of the group reservoirs has changed the water and sediment conditions of the rivers and lakes in the middle and lower reaches of the Yangtze River.This has in turn changed the water flow and sediment transport,erosion and deposition and the relationship between rivers and lakes,which are the focus of this study.The results show that,under the combined effect of group reservoirs,the runoff and the proportion of the middle and lower reaches of the rivers and lakes has no significant change,however,the sedimentation rate and proportion composition has significantly changed,particularly in Yichang station.The middle and lower reaches of the Yangtze River transfer from high sediment concentration under natural conditions to low sediment concentration,while the deposition in rivers and lakes transfers from cumulative under the natural condition to continuous erosion and it will undergo adjustment in a longer period.The combined effect of the group reservoirs on water flow and sediment exchange,scouring and deposition in lakes causes the earlier arrival of the dry season in the Dongting Lake and Poyang Lake,great decrease of the sediment deposition rate in lakes and the overall relationship between the rivers and lakes tending towards to improvement.Due to the uncertainty of the changes of flow and sediment conditions in the Yangtze River,the human activities and the complexity of the evolution of the rivers and lakes system,it is necessary to further investigate the response mechanism of the middle and lower reaches of the rivers and lakes in the future.关键词
水库群/水沙条件/江湖关系/江湖演变Key words
group reservoirs/flow and sediment conditions/the relationship between the river and lakes/the evolution of the river and lakes分类
建筑与水利引用本文复制引用
卢金友,姚仕明..水库群联合作用下长江中下游江湖关系响应机制[J].水利学报,2018,49(1):36-46,11.基金项目
国家重点研发计划项目(2016YFC0402300) （2016YFC0402300）
国家自然科学基金项目(51339001,51379018) （51339001,51379018）
