Page 88 - 《水资源与水工程学报》2023年第3期
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betweenNDVIandSPI12inmostregions,43.26% oftheregionsshowingapositivecorrelation,which
mainlydistributedinthemiddleandsoutheastoftheHRB.Attheseasonalscale ,theresponseofspring
NDVItoSPI3wasthemostobvious,and85.64% oftheregionsshowedpositivecorrelation.Atthe
monthlyscale ,SPI1andSPI3hadthemostobviousinfluencesonVCIinspring,whereasSPI12hada
greaterinfluenceinautumn.Amongthedifferentlandusetypes,grasslandandarablelandwerehighly
correlatedwithSPI,indicatingthattheywerelessresistanttodroughts.
Keywords:meteorologicaldrought;vegetationchange;standardizedprecipitationindex(SPI);drought
response ;multitimescale;HanjiangRiverBasin
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