基于Maan-Kendall检验和小波功率谱分析的滏阳河径流量变化研究  

Study on Runoff Variation of Fuyang River Based on Maan-Kendall Test and Wavelet Power Spectrum Analysis

作　　者：刘丽 Liu Li(Xingtai Hydrographic Survey and Research Center of Hebei Province,Xingtai 054000,Hebei)

机构地区：[1]河北省邢台水文勘测研究中心,河北邢台054000

出　　处：《陕西水利》2024年第4期29-31,35,共4页Shaanxi Water Resources

摘　　要：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m^(3)/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m^(3),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3 a~5 a的短周期为主,此周期为7 a~8a和14 a。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 m/a,but it was not significant(P>0.05).The average annual runoff is 1.496 billion m,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.

关 键 词：径流量 滏阳河 Man-Kendall检验 小波功率谱 

分 类 号：P333[天文地球—水文科学]