Page 5 - 《水资源与水工程学报》2024年第2期
P. 5
!35 "!2 # & ' ( ) & * + , - Vol.35No.2
2024 $ 4 % JournalofWaterResources&WaterEngineering Apr.,2024
DOI:10.11705/j.issn.1672-643X.2024.02.01
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GHIJK:P333;TV122. 3 LMNOP:A LQRK:1672643X(2024)020001011
Nonstationarydesignfloodcalculationviaintegrating
ARIMAmodelandMCMCmethod
3,4,5
1,2
1,2
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1,2
DONGLijun ,DONGXiaohua ,MAYaoming ,WEIChong ,YUDan ,BOHuijuan 1,2
(1.CollegeofHydraulicandEnvironmentalEngineering,ChinaThreeGorgesUniversity,Yichang443002,China;2.Hubei
ProvincialCollaborativeInnovationCenterforWaterResourcesSecurity (WuhanUniversity),Wuhan430070,China;
3.StateKeyLaboratoryofTibetanPlateauEarthSystem,ResourcesandEnvironment(TPESRE),Instituteof
TibetanPlateauResearch ,ChineseAcademyofSciences,Beijing100101,China;4.CollegeofAtmospheric
Sciences,LanzhouUniversity,Lanzhou730000,China;5.NationalObservationandResearchStationfor
QomolongmaSpecialAtmosphericProcessesandEnvironmentalChanges ,Dingri858200,China)
Abstract:Normalnonstationaryhydrologicalfrequencyanalysismethodsarepronetosubjectivitywhen
selectingcovariatesandestablishingthefunctionalrelationshipbetweenstatisticalparametersandcovari
ates.Besides ,thesemethodscanonlyproducedesignfloodestimations,lackingtheabilityofconducting
simultaneousuncertaintyanalysis.Toaddresstheaboveshortcomings ,theARIMA-MCMCmodelwas
establishedbyintroducingthetimevaryingstatisticalparametersofthefittingperiodintotheMCMCsam
plingprocess,thentheparametersamplingforthenonstationarydesignfloodfrequencydistributionmod
elwasconductedunderfutureclimatechangeconditions.Basedontheposteriordistributionofthepa
rameters ,thedesignfloodfrequencywascalculated,andthecorrespondingconfidenceintervalswerede
rived.TakingtheXiaodeshiStationintheYalongRiverBasinasanexample ,thevariationofdesign
!"#$:20230711; %$:20231209
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