华北水利水电大学学报（自然科学版）2026，Vol.47Issue(1)：73-83,11.DOI:10.19760/j.ncwu.zk.2026009
沅江流域气象-水文干旱时空演变及传播特征
Spatiotemporal Evolution and Propagation Characteristics of Meteorological-to-Hydrological Drought in Yuanjiang River Basin
摘要
Abstract
[Objective]This study aims to analyze the propagation time and patterns from meteorological drought to hydrological drought,providing theoretical guidance for regional drought early warning and prevention.[Methods]The Yuanjiang sub-basin in the Dongting Lake Basin was taken as the research object.The drought indices,including standardized precipitation index(SPI),standardized precipitation evapotranspiration index(SPEI),and standardized runoff index(SRI),were applied in combination with the theory of runs and Pearson correlation analysis to examine the spatiotemporal characteristics and propaga-tion processes of meteorological and hydrological droughts.[Results](1)In terms of frequency,hydrological drought occurred at a level comparable to meteorological drought,whereas the mean duration and severity of hydrological drought were stronger than those of meteorological drought.(2)Spatially,drought frequency based on SPI-3 showed a decreasing trend from northwest to southeast,while that based on SPEI-3 showed the opposite trend.Temporally,SPI-and SPEI-based meteorological droughts had similar characteristics,both exhibiting the same future trends with hydrological drought(SRI),characterized by increasing dryness in spring and autumn and gradual wetness in summer and winter.However,hydrological drought lagged behind meteoro-logical drought,requiring a propagation time.(3)The propagation process from meteorological drought to hydrological drought exhibited obvious seasonal differences.The propagation time was shorter and the correlation was higher in spring and summer,while the propagation time was longer and the correlation was lower in autumn and winter.Overall,the drought propagation time ranged from 1 to 5 months.[Conclusion]The duration and intensity of hydrological drought are stronger than those of meteoro-logical drought,and their frequencies are relatively equivalent.The spatial distribution of drought varies with indices,whereas the temporal trends are consistent.Hydrological drought lags behind meteorological drought.The meteorological-to-hydrological drought propagation time and its correlation show seasonal differences.关键词
气象干旱/水文干旱/游程理论/传播时间/沅江流域Key words
meteorological drought/hydrological drought/theory of runs/propagation time/Yuanjiang River Basin分类
农业科技引用本文复制引用
孙丁旭,李伟,李杨,马昱斐,龙秋波,万芳,鞠琴..沅江流域气象-水文干旱时空演变及传播特征[J].华北水利水电大学学报（自然科学版）,2026,47(1):73-83,11.基金项目
湖南省水利科技项目(XSKJ2023059-06) （XSKJ2023059-06）
"十四五"国家重点研发计划青年科学家项目(2023YFC3081000) （2023YFC3081000）
中国气象局干旱气象科学研究基金(IAM201901) （IAM201901）
洞庭湖防洪及水资源保障工程技术研究中心开放基金(HHPDI-KFKT-202304). （HHPDI-KFKT-202304）
