古宜河上游气象干旱和水文干旱演变特征及关系研究  

Study of meteorological drought and hydrological drought evolution characteristics and relationship for upper reaches of Guyi River

作　　者：龙诗婷 LONG Shi-ting(Guilin Hydrology Center,Guilin 541100,China)

机构地区：[1]桂林水文中心,广西桂林541100

出　　处：《广西水利水电》2024年第5期34-38,43,共6页Guangxi Water Resources & Hydropower Engineering

摘　　要：本研究基于古宜河上游1973—2022年的逐月降水和径流数据,计算了不同时间尺度的标准化降水指数和标准化径流指数,分析了气象干旱和水文干旱的演变规律,并探讨了水文干旱对气象干旱的响应特征。结果表明:年尺度下,近50年间古宜河上游气象和水文干旱程度均逐渐减轻;研究区内气象干旱的发生频率范围为25%~40%,高值中心普遍分布在西南部地区;3个月尺度下,水文干旱对气象干旱响应的时间为0~1个月。Based on the monthly precipitation and runoff data of the upper reaches of Guyi River from 1973 to 2022,the author calculated the standard precipitation indexes and standard runoff indexes on different time scales,ana⁃lyzed the evolution characteristics of meteorological drought and hydrological drought,discussed the response char⁃acteristics of hydrological drought to meteorological drought.The results of study demonstrate on an annual scale,the degree of meteorological and hydrological drought in the upper reaches of Guyi River has gradually decreased in the past 50 years;the occurrence frequency of meteorological drought in the study area is variable within 25%~40%with high value centers generally distributed in the southwest region;and on a 3-month scale,the response time of hydrological drought to meteorological drought is 0~1 month.

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 古宜河 

分 类 号：P339[天文地球—水文科学] P426.616[水利工程—水文学及水资源]