Page 80 - 《水资源与水工程学报》2025年第2期
P. 80

!36 "!2 #                         & ' ( ) & * + , -                               Vol.36No.2
               2025 $ 4 %               JournalofWaterResources&WaterEngineering                 Apr.,2025

            DOI:10.11705/j.issn.1672-643X.2025.02.09


                         1956—2022 d»|7s´ÿghbc_


                                            íîgh)*Há


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                 FGHIJ:TV125   KLMNO:A    KPQJ:1672643X(2025)02007608
                         Variationcharacteristicsandfuturetrendofrainfallinthe
                               DongjiangRiverSourceAreaduring 1956-2022


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            ZENGJinfeng,HUDonggui,LIUZuwen,XIEShuishi,XUXiaojuan,ZHANGJun,LIUXinggen
                 (1.HydrologyandWaterResourcesMonitoringCenterintheUpperGanjiangRiver,Ganzhou341000,China;2.Schoolof
                 HydraulicEngineering,NanchangInstituteofTechnology,Nanchang330002,China;3.SchoolofCivilandSurveying&
                          MappingEngineering,JiangxiUniversityofScienceandTechnology,Ganzhou341000,China)
                 Abstract:DongjiangRiverplaysacriticalroleinthewatersupplysafetysystem oftheGuangdong-
                 HongKong-MacaoGreaterBayArea.Itisofgreatsignificancetoexploretherainfallchangesandfuture
                 trendsfortheefficientdevelopmentandutilizationofwaterresourcesintheDongjiangRiverSourceArea.
                 Basedontherainfalldataof24representativemeteorologicalstationsfrom1956to2022 ,thecharacteris
                 ticsofrainfallchangesontheintraannualandinterannualscaleswerestudiedbymeansofMann-Ken
                 dallmutationtestandwaveletanalysis.Subsequently ,thefuturerainfalltrendchangeswerepredictedby
                 Hurstcoefficientandcorrelationfunctionmethod.Theresultsshowthattheratioofrainfallindryseason
                 tofloodseasonwasabout3∶7 ,theconcentrationdegreewas0.12-0.60,andrainfallmainlyconcentrat
                 edinMay.Theintraannualdistributionofrainfallshowedatrendofdiscretizationinthestudyperiod.
                 TherainfallconcentrationperiodofXunwuRiverwasadvancedby4days,andDingnanRiverby11
                 days.Intermsofinterannualchanges,theratesofannualrainfallofXunwuRiverandDingnanRiver
                 onlyincreasedby0.74mmand0.86mmperyear,respectively,withaprinciplecycleof16a.Itispre
                 dictedthatthestudyareawillstillbeintheperiodoflowrainfallinthenextfewyears.TheHurstcoeffi

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