长江中下游顺直放宽和弯曲分汊连接段河道特征及治理思路*

对长江顺直放宽和弯曲分汊连接河段宽、直、弯、汊的形态特点进行了初步剖析,分析说明了连接河段航道影响因素,并以典型河段为例进行说明；通过分析提出连接河段航道治理思路以守护分汊河段洲头低滩、限制河床横向变形、稳定分汊段进口洲滩形态为主,将过渡段塑造成枯水期曲率合理平顺优良形态.

Characteristics and regulation idea on straight and curved connection sections in the middle Yangtze River

This paper probes into the morphological characteristics of the wide, straight, curved and branched connection reach between the straight relaxing and bending braided part of the Yangtze river, analyzes the influential factors on the channel of the connection reach based on the example of a typical river reach, and puts forward the channel management ideas for the connection reach, i.e. fencing the low beach of the braided reach, limiting the lateral change of the river, firming the bottomland form of the braided entrance area, and shaping the connection reach into a smooth one with reasonable curvature in the dry season.