摘要
选取长江干流上游屏山、寸滩和宜昌及支流嘉陵江的北碚站、岷江的高场站等水文站为代表站,对比分析各站近期年径流量、年输沙量、年均含沙量等水沙特征值的变化特性。另外,依据宜昌站实测资料重点分析了川江沙卵石推移质的粒径组成情况及其输沙率年内变化过程。分析结果表明:长江上游川江河道含沙量较小,而输沙量较大,从金沙江下游屏山站至宜昌站,输沙量沿程增大,而含沙量则沿程有减有增,但主要是减小。川江沙质推移质输移集中在4-11月,其粒径在汛期的5(或6)月-8(或9)月,粒径先是变细,然后逐渐变粗。而卵石推移质集中在6-10月其粒径在汛期的5(或6)月-8(或9)月,粒径先是变粗,然后逐渐变细。
Taking gauging stations of Pingshan,Cuntan and Yichang（the control stations on the main river of the Yangtze） as well as Beibei（the control station on the branch,Jialing River） and Gaochang（control station on the branch,Minjang River） as key stations,the characteristics of water and sediment of the Chuanjiang River,i.e.the annual runoff,annual sediment load and annual sediment concentration,are analyzed.In addition,the intra-annual process of particle composition as well as the sand and gravel bed load discharge of Chuanjiang River are analyzed based on the observed data of Yichang station.The results show the characteristics of water and sediment of the Chuanjiang River,which is in the upper Yangtze River,were： the sediment concentration was low but the sediment discharge was large;the sediment discharge increased while the sediment concentration was variable,mainly decreasing accompanying with increase along the river reach between Pingshan station（located at the exit of Jinsha River） and Yichang station.The sand bed load transport concentrated from Apr.to Nov.,while the gravel bed load concentrated from Jun.to Oct.The sand bed load became finer and then coarser while the gravel bed load became coarser and then finer in the flood season（May or June to Aug.or Sept.）.
出处
《泥沙研究》
CSCD
北大核心
2011年第1期60-64,共5页
Journal of Sediment Research
基金
中央级公益性科研院所基本科研业务费资助项目:长江上游泥沙资源演化与配置研究(YWF09029)
关键词
川江
含沙量
沙卵石推移质
粒径
长江
Chuanjiang River
Yangtze River
sediment concentration
sand and gravel bed load
diameter
