Page 35 - 《水资源与水工程学报》2022年第1期
P. 35
!33 " ! 1 # & ' ( ) & * + , - Vol.33No.1
2022 $ 2 % JournalofWaterResources&WaterEngineering Feb.,2022
DOI:10.11705/j.issn.1672-643X.2022.01.05
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Applicationofmultivariatecomprehensivedroughtindex
intheWeiheRiverBasin
ZHUYuelu,ZHANGYang
(SchoolofHydraulicandEcologicalEngineering,NanchangInstituteofTechnology,Nanchang330099,China)
Abstract:Theconventionalunivariatedroughtindexisnotgenerallyapplicabletoallcases;however,
themultivariatedroughtindexhasthedisadvantagesofstrongsubjectivityandcontingencywhenweigh
ting.Inviewofthis ,fourtypicalunivariatedroughtindiceswereselectedtoconstructthecomprehensive
droughtindexMHDI,whichcancharacterizeboththemeteorologicaldroughtandhydrologicaldrought,u
singentropyweight,fuzzyevaluationandempiricalweighting.TheresultsshowthatMHDIcaneffectively
identifytypicaldroughteventsandextremedroughteventsintheWeiheRiverBasin.Thedroughtofthe
basinshowedanupwardtrendwithfluctuationsontheintergenerationalscale ,whichreachedthemaxi
muminthe1990s;ontheinterannualscaleitshowedadriertrendyearbyyear,inwhichtheJinghe
RiverBasin ,themiddlereachesoftheWeiheRiverandthelowerreachesoftheWeiheRiverplayedpri
maryroles ;ontheannualscale,thedroughtcharacteristicswassignificantinspringandautumn,among
whichAprilandNovemberwerethedriest.In2010-2020 ,thecalculationresultsoftheHurstcoeffi
cientofMHDIinallthesubbasinswerealllessthan0.5,indicatingthatthedroughtofthebasinwould
bealleviatedtosomeextent.Theresearchfindingscanprovideareferencefortheindustrialandagricul
turalproductionintheWeiheRiverBasin.
Keywords:meteorologicalandhydrologicaldroughtindex(MHDI);hydrologicaldroughtindex;me
teorologicaldroughtindex ;riskassessmen;theWeiheRiverBasin
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