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Analysis on changing characteristic of runoff series of Weihe River

机译:渭河径流序列变化特征分析。

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The Weihe River is the largest tributary of the Yellow River. The annual runoff contributes to 80% of ShanXi province’s GDP and directly supports 64% of the population of ShanXi province. In order to best maximize water resources management, the runoff series from six hydrologic gauging stations (Huaxian, Lintong, Linjiacun, Xianyang,Zhangjiashan and Weijiabao) are obtained, the Mann–Kendall test, and wavelet transform methods were used to detect the characteristic of runoff variation from 1960 to 2005. The results show that: (1) the runoff present a downward trend over the past 46 years, and the trends are intensified downstream; (2) most of the abrupt changes in runoff appear in the early 1970s, early 1980s to middle 1990s through the result of the Mann–Kendall test; and (3) the annual runoff periods of the WeiHe include 2~4a, 5~6a, 11~14a, 24~26a, respectively. The results of this study imply that less precipitation and warmer climate in the basin are the primary factors that cause this decreasing trend of runoff.
机译:渭河是黄河的最大支流。年度径流占陕西省GDP的80%,直接支持陕西省64%的人口。为了最大程度地发挥水资源管理的作用,获得了六个水文监测站(华县,临tong,林家村,咸阳,张家山和魏家堡)的径流序列,采用了Mann-Kendall检验和小波变换方法来检测水文特征。从1960年到2005年径流变化。结果表明:(1)近46年来径流量呈下降趋势,下游呈加剧趋势。 (2)通过Mann-Kendall检验的结果,大多数径流的突然变化出现在1970年代初,1980年代初至1990年代中期。 (3)渭河的年径流量分别为2〜4a,5〜6a,11〜14a,24〜26a。这项研究的结果表明,流域降水减少和气候变暖是造成径流减少趋势的主要因素。

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