杂木河流域降水与径流演变特征及响应关系研究

Study on the Evolution Characteristics and Response Relationship of Precipitation and Runoff in Zamu River Basin

为掌握杂木河流域降水径流变化特征及响应关系,本文收集杂木河1956—2021年水文资料,采用Mann-Kendall趋势检验法、有序聚类法对流域内降水径流进行研究。结果表明,流域内降水与径流主要集中在5—9月,两者在年极值上出现很强的同步性,在春季、夏季出现变异且变化比较显著;春季、夏季降水量出现显著递增趋势、径流出现显著减少趋势;在季节、年际尺度上的变异出现明显的同步性,序列均在1962年、2009年、2012年出现变异。研究成果可为区域内水资源规划评价提供参考。

In order to understand the change characteristics and response relationship of precipitation and runoff in Zamu River Basin,this paper collects hydrological data from 1956 to 2021 and uses Mann-Kendall rank correlation test and ordered clustering method to investigate precipitation and runoff in the basin.The results show that precipitation and runoff in the basin are mainly concentrated from May to September,and there is strong synchronicity in the annual extreme values.In spring and summer,significant variability and changes are observed.Precipitation shows a significant increasing trend,while runoff shows a significant decreasing trend.There is significant synchronicity in the variation at the seasonal and inter-annual scales,and the sequences all showed variation in 1962,2009 and 2012.The research results can provide reference for the evaluation of water resources planning in the region.