长江下游扬中河段演变与影响因素分析

Analysis on the evolution and influencing factors of Yangzhong section in the lower reaches of Yangtze River

本文基于实测资料,从汊道分流、岸线、冲淤、主流、横断面等方面分析长江扬中河段演变特性,在此基础上分析河道演变影响因素,对治理思路提出了初步探讨。结论表明:扬中河段河道平面形态及两岸岸线总体基本稳定,除局部河床有所调整外,整体上已形成基本稳定的河势格局。治理研究应重点关注嘶马弯道险工段以及近年来新形成的崩岸及险工段,改造局部丁坝,加固已实施的护岸,增加新守护,对新出现的崩岸及险工段进行治理。

The evolution characteristics of Changjiang Yangzhong section are analyzed from the aspects of branching,shoreline,erosion and deposition,main stream,cross section,etc.in the paper based on the measured data.The river evolution influencing factors are analyzed on the basis.The preliminary discussion is proposed on the management ideas.The conclusion shows that the river plane shape and the bank line of Yangzhong section are basically stable as a whole,except some adjustments on the local riverbed,and a basically stable river pattern has been formed as a whole.Management research should be based on Sima curved dangerous section and new formation of bank failure and dangerous section in recent years.Local groin should be reconstructed,reinforcement should be carried out on the implemented bank,new protection should be increased,and the new bank failure and dangerous section should be governed.