基于集对分析法的渭河中下游径流变化特征研究

对渭河流域中下游径流的时空变化进行分析,为流域地表径流的深入研究和合理开发利用提供基础数据。利用渭河流域中下游典型水文站的实测数据,采用线性倾向法分析年径流量变化趋势,采用集对法分析径流量的空间变化特性。结果表明:20世纪70年代以来,渭河流域径流量呈现减少趋势,各站年径流量的变化趋势相似;渭河中下游各水文站年径流量空间变化上存在一定的同步性。基于集对原理的水文分析方法简单方便、结果合理,在水文水资源领域的径流空间变化特性分析研究中具有推广和应用价值。

Study on characteristics of runoff change in middle and lower reaches of Weihe River based on SPA

The paper analyzed the spatiotemporal characteristics of runoff in the middle and lower reaches of Weihe River basin,which could provide the basis for the depth research and rational development and utilization of water resources.It used the measuring data of typical hydrological station in the middle and lower reaches of Weihe river basin and analyzed the trend of annual runoff by using linear trend analysis, and investigated the spatial patterns of runoff by using the set pair analysis. The results showed that the runoff of Weihe River basin has presented the trend of decrease since 1970s, and the variation of annual runoff each hydrology station is similar;the variations of annual runoff in the middle and lower reaches of Weihe River has characteristics of synchronicity.The hydrological analysis method which based on set pair theory is simple and convenient, and the result is reasonable, which has promotional and application value in the study of change characteristics of runoff among the field of hydrology and water resources.