人民长江2015，Vol.46Issue(17)：1-6,6.DOI:10.16232/j.cnki.1001-4179.2015.17.001
长江河口南支河道近期演变与自动调整过程研究
Recent evolution and self-adjustment processes of south branch of Yangtze River estuary
摘要
Abstract
Based on the digital topographic map and hydrological sediment data since 1997 and the recent hydrologic field ob-servations, the self-adjustment process of south branch in Yangtze estuary under the influence of Xinliuhe shoal protection works and Three Gorges Project are analyzed. The results indicate that the water fluvial regime is stable and the riverbed is in continu-ous erosion state under the condition of sharp sediment decrease and unchanged discharge since the completion of Three Gorge Project;the river bed is continuously scoured but the intensity has become smaller and has a new balance tendency since 2006;in the same period, the cross sections are narrower and deeper, the changes of Baimao and Xinliuhe shoals exert significant influ-ence on the stability of the channel; the erosion and deposition of south and north passage bifurcations changes frequently; the constructed Xinliuhe shoal protection works and Nanshatou channel submerged dike projects play a great role in shoal fixing and flow limiting, but can not prevent the trend of intense erosion at the front areas of Xinliuhe shoal and Nanshatou channel. Some effective measures should be taken to the tail of Biandan shoal.关键词
河床演变/人类活动/自动调整/长江河口南支Key words
river channel evolution/human activities/self-adjustment process/south branch of Yangtze River estuary分类
建筑与水利引用本文复制引用
张晓鹤,李九发,姚弘毅,朱文武..长江河口南支河道近期演变与自动调整过程研究[J].人民长江,2015,46(17):1-6,6.基金项目
国家自然科学基金项目(51479074) （51479074）
