Page 39 - 《水资源与水工程学报》2023年第4期
P. 39

!34 " ! 4 #                       & ' ( ) & * + , -                               Vol.34No.4
               2023 $ 8%                JournalofWaterResources&WaterEngineering                 Aug.,2023

            DOI:10.11705/j.issn.1672-643X.2023.04.05


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                 monsoonindex ) W PDO(Pacificdecadaloscillation) ·k?de CDDW CWD^ì‚ST£]IÛ。
                 JKL: ˆì×ól£@; âãUV; ST£]IÅ; ²³ŽG=p; ÝÒ·de
                                 +
                 MNOPQ:P426.61 4   7RSTU:A    7VWQ:1672643X(2023)04003510
                      Spatiotemporalchangesincontinuousextremeprecipitationand
                                 itsclimaticdriversintheJialingRiverBasin

                                                    3
                                         1,2
                                                                1
                                                                                             1,2
                                                                             4
                          WANGYuefeng ,HUYue,YINSiwei,YANGQin,LIUChunhong
                   (1.CollegeofGeographyandTourism,ChongqingNormalUniversity,Chongqing401331,China;2.ChongqingKey
                       LaboratoryofEarthSurfaceProcessandEnvironmentRemoteSensingintheThreeGorgesReservoirArea,
                    Chongqing401331,China;3.GunanMiddleSchoolinQijiangDistrict,Chongqing,Chongqing401420,China;
                               4.ClimateCenterofChongqingMeteorologicalService,Chongqing401147,China)
                 Abstract:TheissuesaboutclimaticdriversofextremeprecipitationintheJialingRiverBasinarecom
                 plexandunclear.Inordertoinvestigatetheclimaticdrivers ,wecollecteddailyprecipitationdatafrom
                1960to2019toanalyzethespatiotemporalchangesoftheconsecutivedrydays (CDD)andconsecutive
                 wetdays(CWD),usingstatisticalmethodsofSen’slope,Mann-Kendall,andrandomforest.There
                 sultsshowedthatthetrendsofCDDandCWDwere3.8-4.8d/10aand0.42-0d/10a ,with2
                 (3.3%)and10(15.9%)stationsreachingthesignificanttrendofp=0.05,respectively.Intermsof
                 localclimaticdrivers ,therewasastrongpositivecorrelationbetweenCWDandannualprecipitation,with
                 thecorrelationcoefficientsof34(54%)stationsreachingthesignificanttrendofp=0.05.Asforcli
                 matecirculation ,bothsingleandmultifactoranalysisshowedthatNino3.4andSOI(southernoscilla
                 tionindex)werethemaindrivingfactorsofthecontinuousextremeprecipitationintheJialingRiverBa
                 sin,andtherewere28(44.4%)and15(23.8%)stationswithsignificantcorrelationcoefficientsfor

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