长江干流监利站水沙特性分析

监利河段位于长江中下游14个重点河段之一荆江河段的下段。根据对该河段代表水文站--监利水文站多年统计资料分析，监利站年径流量变化过程与年输沙量变化过程均呈不规则周期性变化，且以20世纪80年代末期为界，明显地分为2个阶段，2006年为长江枯水少沙年份，径流量、输沙量均为历年来最低值。监利站径流量年内分配与输沙量基本一致，均集中于汛期5-10月，且输沙量更为集中。水沙关联性分析结果表明，监利站来水来沙总体呈正相关性，即径流量越大，输沙量也就越大。监利站的水沙变化除了受长江上游来水来沙变化的影响外，下荆江裁弯工程、荆江三口分流分沙变化 及三峡工程等水利枢纽建设，均是主要影响因素。

Characteristics Analysis of Water-sediment Load at Jianli Hydrological Station on Changjiang River Main Stream

The Jianli river reach is located in the lower part of Jingjiang river reach which is one of the 14 key reaches in the middle and lower reaches of Changjiang River.By analyzing the 1950-2006 prototype data of Jianli Station in Jianli river reach,a representative hydrological station,some conclusions indicate as follows: The annual runoff and sediment load of Jianli river reach all changed irregularly and periodically,and were divided into two phases clearly by late 1980s.In 2006,the annual runoff and sedime...