长江下游连续分汊段汊道演变的关联性研究

长江下游安庆河段由安庆水道、太子矶水道、贵池水道3个连续多分汊河道组成,近期3个汊道段河床演变复杂。依据实测水文、地形资料和数学模型计算等手段,分析3个连续汊道段在水流动力、流速分布、水位及分流比变化方面的关联性,并提出在河道治理及航道整治中应注重保有汊道间过渡段及维持关键洲滩岸线稳定的建议,可为类似工程提供借鉴。

Study on correlation of continuous branching channels in lower reaches of the Yangtze River

The Anqing reach in the lower reaches of the Yangtze River consists of three continuous branching channels including Anqing waterway,Taiziji waterway and Guichi waterway,of which the recent fluvial process is intricate.Based on survey hydrology,terrain data and mathematical model,we analyze the relevance of flow dynamics,velocity distribution,stage and the change of split ratio of three continuous branching channels,and suggest that the transition section between the branches and the stability of the key beach shoreline should be maintained in the river and waterway regulation project.The results can provide reference for similar project.