淮河上中游年径流变化特性分析

Analysis of Characteristics of Annual Runoff Variation in Upper and Middle Reaches of Huaihe River

基于淮河干流上游、中游4个水文站1951-2010年径流资料,采用累积距平、mann-kendall非参数检验法对淮河径流年际变化的趋势性及突变型进行研究;采用小波分析法对淮河径流变化特征进行研究,讨论淮河流域不同时间尺度下的丰、枯交替变化周期规律.研究结果表明:淮河流域径流量年纪丰枯变化剧烈,年径流序列在1956年均出现突变,1956-1961年、1975-1979年、1991-1995年处于下降趋势,2001-2008年处于上升趋势;在第1主周期27年尺度上,年径流量共经历了3个丰、枯水期变换,平均变换周期为17年左右.

Based on the runoff data of four hydrological stations in the upper and middle reaches of the main stream of the Huaihe River from 1951 to 2010,the trend and catastrophe of the annual runoff change of the Huaihe River are studied by using cumulative anomaly and Mann-Kendall non-parametric test method.The wavelet analysis method is used to study the variation characteristics of runoff in Huaihe River;and the periodic regularity of abundance and abundance change in different time scales of Huaihe River Basin is discussed.The results show that the annual runoff of the Huaihe River Basin varies dramatically with years;and the annual runoff series changes abruptly in 1956,declines in 1956-1961,1975-1979,1991-1995,and rises in 2001-2008.On the 27 th year scale of the first main cycle,the annual runoff has experienced three changes in the abundance and dry season,and the average transformation period is about 17 years.