Page 88 - 《水资源与水工程学报》2022年第6期
P. 88

! 33 " ! 6 #                      & ' ( ) & * + , -                               Vol.33No.6
               2022 $ 12 %              JournalofWaterResources&WaterEngineering                 Dec.,2022

            DOI:10.11705/j.issn.1672-643X.2022.06.11


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                 KLDMN:P467   OPQRS:A    OTUN:1672643X(2022)060084011

                    Characteristicsandfuturepredictionofextremeprecipitationinthe
                                  middleandupperreachesofWujiangRiver

                                  FENGYelin,JIAOShulin,HEZhonghua,YANGLiuying
                       (SchoolofGeographyandEnvironmentalScience,GuizhouNormalUniversity,Guiyang550025,China)

                 Abstract:BasedonthedailyprecipitationdataofthemiddleandupperreachesoftheWujiangRiver
                 from1961to2019,thespatiotemporalcharacteristicsofextremeprecipitationwerestudiedusingtrenda
                 nalysis ,EOFandwaveletanalysis.Atthesametime,inordertomakethestudyholistic,threescenarios
                 (SSP126,SSP245andSSP585)underfiveGCMsinCMIP6wereusedtoestimatefutureprecipitation
                 changes(2020-2100)afterdownscaling.Theresultsshowthattheextremeprecipitationhasincreased
                 anddecreasedinthepast59yearswithinsignificantchanges.Intermsofthechangecycles ,thecycleof
                 strongsignalmainlyconcentratedonthetimescaleof23-30aandranthroughthewholetimeseries.In
                 thefirstmode ,thechangesofthefiveextremeprecipitationindiceswereconsistentspatially,butdiffer
                 entiatedinthesecondmode.Ingeneral,thefutureextremeprecipitationeventswillincreasewiththein
                 creaseofSSPscenarios,andthetrendismainlypositive.Theresearchresultscanprovidesomereference
                 forwatersecuritycontrol ,planningandconstruction,disasterpreventionandmitigationintheWujiang
                 RiverBasin.
                 Keywords:extremeprecipitationevent;extremeprecipitationindex;precipitationprediction;Coupled
                 ModelIntercomparisonProjectPhase6 (CMIP6);globalclimatemodels(GCMs);themiddleandupper
                 reachesofWujiangRiver

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