Page 24 - 《水资源与水工程学报》2023年第5期
P. 24
! 34 " ! 5 # & ' ( ) & * + , - Vol.34No.5
2023 $ 10 % JournalofWaterResources&WaterEngineering Oct.,2023
DOI:10.11705/j.issn.1672-643X.2023.05.03
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EFGHI:P426.616 JK7LM:A JNOI:1672643X(2023)05002012
Spatiotemporalvariationandbivariateregionalfrequencyanalysisof
meteorologicaldroughtsinGuizhouProvincebasedonSPEI
1
1
2
JIANGZhongfeng,XUGuiping,ZHANGKai
(1.HenanUniversityofUrbanConstruction,Pingdingshan467036,China;2.YellowRiver
HydrographicBureauofSurveyingandMapping ,Zhengzhou450046,China)
Abstract:Inordertoexplorethedevelopmentlawandregionaloccurrenceprobabilitycharacteristicsof
droughteventsinGuizhouProvince,themonthlymeteorologicaldataof1960-2017measuredat17me
teorologicalstationsinGuizhouProvincewereusedtocalculatethestandardizedprecipitationevapotrans
pirationindex(SPEI).Then,theruntheorymethodwiththreethresholds,waveletanalysisandCopula
functionswereusedtoanalyzethespatiotemporalevolutionofdroughtevents ,droughtcycleandregional
returnperiods.TheresultsshowthatdroughtsinGuizhouProvinceaggravatedduring1960-2017 ,but
theintensitiesdifferentiatedindifferentregions ,amongwhichthedrynesstrendwithalineartendency
rateof-0.003/10ainsouthwestGuizhouwasthemostobvious.Thedroughtintensityrankedfromthe
highesttothelowestisasfollows :eastGuizhou,northGuizhou,southwestGuizhou,centralGuizhou,
northwestGuizhouandsouthGuizhou,anddroughtsoccurredmostfrequentlyincentralGuizhou.The
maincyclesofseasonaldroughtswere18 ,15,30and8ainGuizhouProvincewithasignificantdiffer
enceinthedistributionofthesouthandnorth ,andtherangeoftheareaswithlongdroughtcyclesin
creasedfirstandthendecreased.ThedroughtreturnperiodinnorthGuizhouisthesmallest,indicating
thattheregionhasahighoccurrenceprobabilityofextremedroughtevents ,andismostlikelytobeafflic
tedbydroughtdisasters.Theseresultscanprovidetheoreticalreferenceforwaterresourcesmanagement
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(19B570001); µQ[%|k#bíQí«}~ÄÙ-4(202111765034、202211765036)
+,-.: >e(1981—), N, O]%¤(, ;<, ST, ?@ABCDEBWC5Ñ+J。
/0+,: KÁ(1981—), N, µQo9(, jHI>, ?@ABÑC5J+J。