长江东流河段河势演变分析

Analysis of river regime evolution in Dongliu reach of the Yangtze River

长江每年都会经历洪水期和枯水期,河道会发生较大的冲刷和淤积,甚至会发生崩岸等险情,需要对河势进行动态的监测和分析。文中以东流河段为例,采用水文测验、特征线比对、断面套绘和GIS冲淤计算等方法对河道进行研究,总结了东流河段近年来河势的演变特点为上段淤积,中段冲刷,下段淤积,河段总体表现为冲刷。该结论具有代表性,为长江河道治理和保护提供了理论数据基础。

The Yangtze River will experience flood and dry seasons every year,and the river channel will have greater scouring and siltation,and even bank collapse and other dangerous situations.It is necessary to dynamically monitor and analyze the river regime.Taking the Dongliu reach as an example,the river channel is studied by using the methods of hydrological test,characteristic line comparison,section mapping and GIS scouring and silting calculation.The evolution characteristics of the river regime in the Dongliu reach in recent years are summarized as follows:Sedimentation in the upper and lower section and scouring in the middle section.The overall performance of the river reach is scour.The conclusion is representative and provides a theoretical data basis for river regulation and protection of the Yangtze River.