Page 24 - 《水资源与水工程学报》2022年第3期
P. 24

!33 " ! 3 #                       & ' ( ) & * + , -                               Vol.33No.3
               2022 $ 6 %               JournalofWaterResources&WaterEngineering                 Jun.,2022

            DOI:10.11705/j.issn.1672-643X.2022.03.03


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                 8IBJK:TV122. 3   LMNOP:A    LQRK:1672643X(2022)03002007
                NonstationarydesignfloodanalysisoftheQiujinHydrologicalStationin

                                      theXiuheRiverBasin,PoyangLake

                           WUShaofei,LUOWen,XIONGFandi,OUYANGFen,HUANGBinbin
                 (National&ProvincialJointEngineeringLaboratoryfortheHydraulicEngineeringSafety&EfficientUtilizationofWater
                          ResourcesofPoyangLakeBasin ,NanchangInstituteofTechnology,Nanchang330099,China)
                 Abstract:Thedeterminationofthenonstationarydesignfloodisanintegralpartoftheplanningandde
                 signingofwaterconservancyprojects,aswellasthedecisionmakingoffloodcontrol.Aimingatthedis
                 advantagesoflimitedapplicationoftheannualnonstationaryvalueobtainedbytheconventionaltimevar
                 yingmomentmethod ,weemployedtheexpectednumberofexceedances(ENE)ofreturnperiodtoinves
                 tigatethenonstationarydesignfloodoftheQiujinHydrologicalStationintheXiuheRiverBasinwiththe
                 considerationofmeteorologicalfactorsofprecipitationandairtemperaturederivedfrom thedownscaled
                 generalcirculationmodel (GCM).Thefloodseriesofannualmaximum1day,annualmaximumconsec
                 utive3day,7day,15dayandannualmaximum1monthoftheQiujinHydrologicalStationfrom1956to
                2014wereanalysedtoobtainthenonstationarydesignfloodofmultipletimescales ,whichwerethen
                 comparedwiththoseoftheconventionalmethod.Resultsshowedthatthelocationparameterofallthea
                 bovefiveseriessufferedfromsignificantnonstationarity;thedesignfloodvalueswereofgreatdifference
                 betweenthestationarymodelsandthenonstationarymodelswithprecipitationandtemperatureascovari
                 ates.Particularly ,atthereturnperiodsof20aand50aofeachtimescale,thenonstationarydesign
                 valuesreducedbyabout13.5% -32.6% (about26.4% average)and15.3% -39.1% (about31.
                0% average )underthescenariosofRCP4.5andRCP8.5,comparedwiththestationaryones.Thisre
                 searchmayprovideacontributiontotheregionalflooddisasterpreventionandthereuseoffloodre

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