选用滏阳河流域典型水文站1961年～2020年的逐月径流量资料,运用Mann-Kendall非参数检验、Morlet小波分析法,探究滏阳河年径流量变化特征.结果表明,河北省近60年来径流量总体呈波状减少趋势,并以-0.112亿m3/a的速率递减,但并不显著(P＞0.05).其多年平均径流量为14.96亿m3,丰枯变化与季节性降水、年际降水量丰度密切相关.径流量演变存在多个阶段性特征,但并未通过突变特征检验.其变化周期以3a～5a的短周期为主,此周期为7 a～8a和14 a.
Study on Runoff Variation of Fuyang River Based on Maan-Kendall Test and Wavelet Power Spectrum Analysis
Based on the monthly runoff data of typical hydrological stations in Fuyang River Basin from 1961 to 2020,Mann-Kendall nonparametric test and Morlet wavelet analysis were used to explore the variation characteristics of annual runoff in Fuyang River.The results showed that the runoff in Hebei Province showed a wave-like decreasing trend in the past 60 years,and decreased at a rate of-0.112 × 100 million m3/a,but it was not significant(P＞0.05).The average annual runoff is 1.496 billion m3,and the change of wet and dry is closely related to the abundance of seasonal precipitation and interannual precipitation.The evolution of runoff has multiple stage characteristics,but it has not passed the test of mutation characteristics.The variation period is mainly 3 a～5 a,and this period is 7 a～8 a and 14 a.
runofffuyang Riverman-Kendall testwavelet power spectrum
万方数据
维普
