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文章主要采用Mann-Kendall趋势分析法,对卫河代表性控制站合河、淇门和元村水文站多年年径流量以及流域年平均雨量序列进行分析,结果显示:卫河流域年径流量序列有显著减小趋势,发生显著突变的年份在20世纪70年代初期;流域年降雨量有减小趋势,但变化不显著;人类活动明显改变了流域下垫面产汇流条件,流域径流系数呈减小趋势。
The Mann-Kendall trend analysis method is mainly used to analyze the annual runoff of Hewei, Qiimen and Yuancun hydrological stations and the annual average rainfall series of Weihe River hydrological station. The results show that the annual runoff series There was a significant decrease in the trend, a significant change in the years of the early 1970s; annual rainfall in the basin has decreased, but the change was insignificant; human activities have significantly changed the basal pad flow convergence conditions, the basin runoff coefficient was reduced Small trend.