秃尾河流域水沙特性变化分析

Analysis of the characters of runoff and sediment in Tuweihe River Basin

秃尾河是黄河中游河龙区间一条多泥沙河流,通过对其降水、径流和泥沙等水文资料的分析,重点讨论了20世纪70年代前后降雨量、径流量和泥沙量的变化,认为70年代以前降雨、径流和泥沙总量大于70年代以后,粗颗粒泥沙逐渐向细化的趋势发展,与天然状态相比,流域水沙关系发生了变化。

Tuweihe River is a more sediment river in Helong area located in middle of the Yellow River. By analyzing the hydrology data such as precipitation, runoff and sediment, this paper emphasized on prior discussing change of precipitation, runoff and sediment before and after in 70 decade in 20^th century, consided that the gross volume of precipitation, runoff and sediment before in 70 decade were large than after in 70 decade, the trend was gradual fine in coarse sediment, the relationship between sand and water in River Basin has been changed compared with the savageness state.