摘要
气象因子是驱动径流演变的重要因素,运用交叉小波方法分析了石羊河上游4条典型支流的径流量与气象要素之间的共振周期规律,揭示了不同时域、频域上相关性的程度变化和异常情况,对现有相关性研究进行了补充。结果表明:西大河水库站与大靖峡水库站径流量总体呈上升趋势,而南营水库站与古浪站呈下降趋势,径流量与降水量的周期规律及相关性最显著,其次是最高气温,最低气温最差,共振周期范围为2~8 a。通过与现有成果的对比分析,表明该方法对探究气象因子突变性、水文气象要素相关性及其时频变化有重要的指导意义,石羊河流域在针对性补水时应优先考虑从降水环节出发,实施人工增雨作业。
Meteorological factors are important factors driving the evolution of runoff.Cross-wavelet method was used to analyze the resonance cycle law between runoff and precipitation,maximum temperature and minimum temperature of four typical tributaries in the upper reaches of Shiyang River,which reveals the degree changes and anomalies of correlation in different time domains and frequency domains,supplementing the existing correlation research.The results show that the runoff at Xidaxihe Reservoir station and Dajingxia Reservoir station has an increasing trend while the runoff at Nanying Reservoir station and Gulang station decreases.The cycle pattern and correlation between the runoff and precipitation are the most significant,followed by the maximum temperature and the minimum temperature,and the resonance period ranges from 2 a to 8 a.The analysis shows that this method plays an important role in guiding the exploration of the mutation of meteorological factors,the correlation of hydrometeorological elements and their time-frequency changes.When implementing targeted water replenishment in the Shiyang River Basin,priority should be given to artificial rainfall from the precipitation link.
作者
徐亦凡
董增川
倪晓宽
邵逸卿
孟金玉
李瑶
XU Yi-fan;DONG Zeng-chuan;NI Xiao-kuan;SHAO Yi-qing;MENG Jin-yu;LI Yao(College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China)
出处
《科学技术与工程》
北大核心
2024年第13期5278-5285,共8页
Science Technology and Engineering
基金
国家重点研发计划(2023YFC3206800)。
关键词
石羊河流域
周期性
交叉小波变换
相关性
Shiyang River
periodicity
cross-wavelet transform
dependence
