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Channel planform and navigation-obstructing characteristics of gravel beach group in upper reaches of the Yangtze River
Author(s): 
Pages: 125-129
Year: Issue:  1
Journal: Port & Waterway Engineering

Keyword:  gravel beach groupnavigation-obstructing characteristicschannel planform;
Abstract: 川江以滩多、流急、水乱而闻名于世,部分滩险之问距离较近,滩险之间相互制约,整治存在相互联动效应,形成滩群,其中卵石滩群碍航特性最为复杂,整治难度非常大.通过对长江上游8个卵石滩群平面形态及以斗笠子—东溪口、神背嘴—叉鱼碛卵石滩群为代表的滩段之间关联特性的分析得到以下认识:卵石滩群一般位于连续弯道(急弯),深槽连接段短、宽度变化大的“藕节状”分汊型河段;下游滩险整治易引起上滩险水位降低,比降增加,恶化上滩险的航道条件;上游滩险整治易改变来水来沙条件,影响下游滩险河床演变.对卵石滩群的整治应整体规划、设计,一次建成.
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