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


                              12 ARIMA345 MCMC678

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                 GHIJK:P333;TV122. 3   LMNOP:A    LQRK:1672643X(2024)020001011
                            Nonstationarydesignfloodcalculationviaintegrating

                                       ARIMAmodelandMCMCmethod

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                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:Normalnonstationaryhydrologicalfrequencyanalysismethodsarepronetosubjectivitywhen
                 selectingcovariatesandestablishingthefunctionalrelationshipbetweenstatisticalparametersandcovari
                 ates.Besides ,thesemethodscanonlyproducedesignfloodestimations,lackingtheabilityofconducting
                 simultaneousuncertaintyanalysis.Toaddresstheaboveshortcomings ,theARIMA-MCMCmodelwas
                 establishedbyintroducingthetimevaryingstatisticalparametersofthefittingperiodintotheMCMCsam
                 plingprocess,thentheparametersamplingforthenonstationarydesignfloodfrequencydistributionmod
                 elwasconductedunderfutureclimatechangeconditions.Basedontheposteriordistributionofthepa
                 rameters ,thedesignfloodfrequencywascalculated,andthecorrespondingconfidenceintervalswerede
                 rived.TakingtheXiaodeshiStationintheYalongRiverBasinasanexample ,thevariationofdesign

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