贵州省水文干旱演变趋势及特征分析

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中图分类号：TV11 文献标识码：A 文章编号：1001-9235（2025）08-0058-09

Evolution Trend and Characteristic Analysis of Hydrological Drought in Guizhou

LISha，ZHUChunrui HUI Xuepiao，LIUZhennan （1.Guiyang HydrologyandWaterResouresBureau，GuzhouProvince，Guiyang 550oo1，China;2.SchoolofCivilEngieing Guizhou Institute of Technology，Guiyang 55ooO1， China）

Abstract：Accurateevaluationofdroughtsituationandcharacterizationofdroughtdevelopmenttrendisthekeytoensuringfood securityandwatersecurityBasedonthegloballandsurfacereanalysisproductofChinaMeteorologicalAdministration，thispaper extractshemonthlysalerunofdataalculatesthstandardiedrunoffindexatdiferentimesales，ndusesepiricalothogonal functiondecompodann-Kendalltsttodesatiompoaldstrbuti，trendange，ndpriodicaactesif multi-scaledroughtinGuizhou Province.Theresultsshowthattheempiricalorthogonal functiondecompositionresultsexhibit significandisiilariy，ndthespatialdisributiocanbesummarzedas"southeast-orthwest"typend"indiectseparatio"type， with the cumulative contribution rate of variance being about 70% .The time characteristics of hydrological drought in Guizhou Provincearesignificant，andmostof heareashaveobviousfluctuationsof"dryandwet"fromaround2Ooo.Withtheinreasentie scale，thedecompositionof positiveandnegativeeigenvectorschangesfrom simpletocomplex.Thetrendchangeof thetime coefcientisgraduallstablewiththeincreaseintimescale.The"dryandwet"evolutiontrendinhydrolgyofGuizhouProvincehas obviousharacteristics.esatialistrbuioof"rydet"inesofhdrologatothlyasalndalalet drought-wet-drought"fromwesttoeast，andthedryandwet intensitydecreasesgraduallfromnorthtosouth.Themonthlyand

seasonalhydrologicalperiodicityof"ryandet"inuzuProvieissigcant，andthemainoscilationperiodisaHowve due to the limitation of data length，the annual hydrological periodicity is not obvious.

Keywords： standardized runoff index; evolution trend; hydrological drought; Guizhou Province

干旱作为世界上影响范围广、发生频率高、持续时间长的一类自然灾害，已经引起了各国政府以及民间组织的高度关注。（剩余8542字）