黄河源区气象干旱与水文干旱关联性分析  

Correlation analysis of meteorological and hydrological droughts in Yellow River source region

作　　者：石朋[1] 詹慧婕 瞿思敏[1] 冯进 管晓祥 SHI Peng;ZHAN Huijie;QU Simin;FENG Jin;GUAN Xiaoxiang(College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学水文水资源学院,江苏南京210098

出　　处：《水资源保护》2022年第3期80-86,共7页Water Resources Protection

基　　金：国家自然科学基金(52179011)。

摘　　要：采用标准化降水指数(SPI)和标准化径流指数(SRI)刻画黄河源区气象干旱和水文干旱过程,通过唐乃亥水文站SRI、源区SPI及3种小波分析方法揭示了1968—2020年黄河源区气象和水文干旱之间的周期性特征及相关性。结果表明:广义极值分布是唐乃亥水文站最适宜的流量分布函数;以Gamma分布和广义极值分布分别作为降水和流量的分布函数,基于距离平方倒数法计算出SPI-9和SRI-1的相关系数最高,为0.68;连续小波变换分析表明SPI-9和SRI-1具有相同的周期特征,交叉小波变换和小波相干分析表明SPI-9和SRI-1在不同周期尺度表现出显著的正相关关系;黄河源区气象干旱向水文干旱的传播时间为9月,SPI-9序列可用于水文干旱监测。The standardized precipitation index(SPI)and the standardized runoff index(SRI)were used to characterize the meteorological and hydrological drought processes of the Yellow River source region,respectively.The SRI of the Tangnaihai hydrological station,the SPI of the Yellow River source region,and three wavelet analysis methods were used to reveal the periodic characteristics of and the correlation between meteorological and hydrological drought processes in the Yellow River source region from 1968 to 2020.The results show that the generalized extreme value distribution was the most suitable distribution function for streamflow at the Tangnaihai hydrological station.Using the Gamma distribution and generalized extreme value distribution as distribution functions of precipitation and discharge,respectively,the correlation coefficient between SPI-9 and SRI-1 was the highest,which was 0.68,based on the inverse distance weighting method.The results from continuous wavelet transform analysis show that SPI-9 and SRI-1 had the same periodic characteristics.A significant positive correlation between SPI-9 and SRI-1 at different periodic scales was found based on cross wavelet transform and wavelet coherence.The propagation time from meteorological drought to hydrological drought was nine months,and SPI-9 series could be used to monitor hydrological droughts in the Yellow River source region.

关 键 词：气象干旱 水文干旱 标准化降水指数 标准化径流指数 小波分析方法 黄河源区 

分 类 号：P426.616[天文地球—大气科学及气象学] P339[天文地球—水文科学]