乌江流域气象干旱的三维特征分析OA
Three-Dimensional Characteristic Analysis of Meteorological Drought in the Wujiang River Basin
以乌江流域为研究区,基于多年气象观测数据计算月尺度气象干旱指数 SPEI-1,构建时空立方体模型,系统刻画气象干旱在时间、空间、强度3个维度上的演变特征.结果表明,流域整体呈"西北偏干、东南偏湿"的空间格局;标准化趋势分数介于-2.38～1.17之间,趋势显著性检验的 P 值最小为 0.017,仅少数区域达到显著水平.基于时空聚类,将研究区划分为 5 类,其中小面积类型多表现为"震荡热点",干旱波动较大;大面积类型多表现为"震荡冷点",干旱较弱且相对稳定.12 个气象站的趋势强度值介于-1.954 8～0.672 5 之间,站点间差异明显,表明气象干旱具有显著的时空异质性与周期性.
Using the Wujiang River Basin as the study area,this study computed the monthly-scale meteorological drought index SPEI-1 from multi-year meteorological observation data.A spatio-temporal cube model was constructed to systematically characterize the evolution of mete-orological drought across three dimensions:time,space and intensity.The results reveal that:The basin exhibits a spatial"drier in the north-west and wetter in the southeast".The standardized trend scores range from-2.38 to 1.17,with the minimum P-value of the trend signifi-cance test being 0.017;Only a few areas reach a statistically significant level.Based on spatio-temporal clustering,the study area is classified into five categories.Among these,small-area types mostly exhibit characteristics of"oscillating hotspots"with significant drought fluctua-tions,while large-area types predominantly behave as"oscillating coldspots"with weaker and relatively stable drought conditions.The trend intensity values for the 12 meteorological stations range from-1.954 8 to 0.672 5,showing notable differences between stations,which underscores the significant spatiotemporal heterogeneity and periodicity of meteorological drought.
谢琰;王跃宇;董晓宁
华北水利水电大学 水利学院,河南 郑州 450046河南省水利厅,河南 郑州 450003华北水利水电大学 水利学院,河南 郑州 450046||黄河水利委员会 黄河水利科学研究院,河南 郑州 450003
农业科技
气象干旱三维特征干旱分析时空立方体乌江流域
meteorological droughtthree-dimensional characteristicsdrought analysisspatio-temporal cubeWujiang River Basin
《人民黄河》 2026 (6)
39-43,64,6
国家自然科学基金青年项目(52409089)黄河水利科学研究院科技发展基金专项(黄科发202403)
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