长江下游典型分汊河段河床演变分析及趋势预测

以多年实测资料为基础,从河段水流动力条件和河床演变分析着手,结合三峡工程的影响,对安庆河段的河势进行研究。该河段河道演变特点为:洪水河势基本稳定;新河口边滩生成后以小幅冲淤变化为主;鹅眉洲与潜洲此消彼长;新中汊的演变与新河口边滩、鹅眉洲和潜洲的变化密切相关。结合航道整治工程的实施,对安庆河段河床演变的趋势进行预测。

Analysis of bed evolution process and prediction of evolution trend of typical multi-branched reach in lower Yangtze River

Based on the annual survey data,this paper analyzes the dydro-dynamic condition and bed evolution process,and researches the river regime of Anqing reach.The characteristics of river bed evolution are as follows:the flood river regime is stable;the Xinhekou point bar is basically stable with slight deposition and erosion;the process of new middle channel is closely related to Xinhekou point bar,Emei sandbar and Qian sandbar.Combining with the implementation of waterway regulation,the fluvial tendency of Anqing reach is predicted.