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:1672643X(2022)01006910
Floodanalysisofthemainstream ofHuaiheRiverunderinconsistentcondition
2
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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:Thechangeanduncertaintyofenvironmentleadtothenonstationarycharacteristicsofhydro
logicalseries.Floodriskanalysisbasedonconsistentconditionignorestheinfluenceofclimatechange
andhumanactivities ,andmayresultsintheunderestimationoffloodrisks.Here,GAMLSSmodelwas
usedasthemarginaldistributionmodelandrainfallasthecovariatetoanalyzetheinconsistentfrequency
oftheannualmaximum1dayflowandtheannualmaximum15dayfloodseriesofsomehydrologicalsta
tionsinthemainstreamofHuaiheRiver,inordertoexplorethevariationoffloodpeakandthedesign
valueoffloodvolumeunderinconsistentconditions.Theresultsshowthatthedesignedmarginaldistribu
tionvaluesoffloodpeakandfloodvolumebasedonconsistentconditionarelowerthanthoseunderincon
sistentconditionintheyearoflargefloodevent.Then ,thejointdistributionmodeloffloodpeakand
floodvolumewasconstructedunderthesetwoconditionsusingCopulafunction,whichwasusedtoana
lyzethecooccurrenceprobabilityofeveryhydrologicalstationinthemainstreamofHuaiheRiverwitha
returnperiodof50years.Itisfoundthatthecooccurrenceprobabilityundertheconsistentconditionin
theyearoflargefloodeventispronetothelapseoffloodriskwithhighpeakandlargevolume.
Keywords:floodrisk;inconsistentcondition;frequencyanalysis;GAMLSSmodel;Copulafunction;
themainstreamofHuaiheriver
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