Page 73 - 《水资源与水工程学报》2022年第1期
P. 73

!33 " ! 1 #                       & ' ( ) & * + , -                               Vol.33No.1
               2022 $ 2 %               JournalofWaterResources&WaterEngineering                 Feb.,2022

            DOI:10.11705/j.issn.1672-643X.2022.01.10


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                 BCDEF:TV122 .5   GHIJK:A    GLMF:1672643X(2022)01006910
             Floodanalysisofthemainstream ofHuaiheRiverunderinconsistentcondition

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                         HONGShuangling,SHIPeng,QUSimin,FENGYing,ZHAOMengjie
                     (1.CollegeofHydrologyandWaterResources,HohaiUniversity,Nanjing210098,China;2.FujianProvincial
                      Investigation,Design&ResearchInstitutionofWaterConservancy&Hydropower,Fuzhou350000,China;
                         3.BureauofHydrology(InformationCenter),HuaiheRiverCommission,Bengbu233001,China)
                 Abstract:Thechangeanduncertaintyofenvironmentleadtothenonstationarycharacteristicsofhydro
                 logicalseries.Floodriskanalysisbasedonconsistentconditionignorestheinfluenceofclimatechange
                 andhumanactivities ,andmayresultsintheunderestimationoffloodrisks.Here,GAMLSSmodelwas
                 usedasthemarginaldistributionmodelandrainfallasthecovariatetoanalyzetheinconsistentfrequency
                 oftheannualmaximum1dayflowandtheannualmaximum15dayfloodseriesofsomehydrologicalsta
                 tionsinthemainstreamofHuaiheRiver,inordertoexplorethevariationoffloodpeakandthedesign
                 valueoffloodvolumeunderinconsistentconditions.Theresultsshowthatthedesignedmarginaldistribu
                 tionvaluesoffloodpeakandfloodvolumebasedonconsistentconditionarelowerthanthoseunderincon
                 sistentconditionintheyearoflargefloodevent.Then ,thejointdistributionmodeloffloodpeakand
                 floodvolumewasconstructedunderthesetwoconditionsusingCopulafunction,whichwasusedtoana
                 lyzethecooccurrenceprobabilityofeveryhydrologicalstationinthemainstreamofHuaiheRiverwitha
                 returnperiodof50years.Itisfoundthatthecooccurrenceprobabilityundertheconsistentconditionin
                 theyearoflargefloodeventispronetothelapseoffloodriskwithhighpeakandlargevolume.
                 Keywords:floodrisk;inconsistentcondition;frequencyanalysis;GAMLSSmodel;Copulafunction;
                 themainstreamofHuaiheriver
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