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_
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FGHIJ:TV125 KLMNO:A KPQJ:1672643X(2025)02007608
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
ticsofrainfallchangesontheintraannualandinterannualscaleswerestudiedbymeansofMann-Ken
dallmutationtestandwaveletanalysis.Subsequently ,thefuturerainfalltrendchangeswerepredictedby
Hurstcoefficientandcorrelationfunctionmethod.Theresultsshowthattheratioofrainfallindryseason
tofloodseasonwasabout3∶7 ,theconcentrationdegreewas0.12-0.60,andrainfallmainlyconcentrat
edinMay.Theintraannualdistributionofrainfallshowedatrendofdiscretizationinthestudyperiod.
TherainfallconcentrationperiodofXunwuRiverwasadvancedby4days,andDingnanRiverby11
days.Intermsofinterannualchanges,theratesofannualrainfallofXunwuRiverandDingnanRiver
onlyincreasedby0.74mmand0.86mmperyear,respectively,withaprinciplecycleof16a.Itispre
dictedthatthestudyareawillstillbeintheperiodoflowrainfallinthenextfewyears.TheHurstcoeffi
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+,-.: Éj2(1979—), ), :^57, :9, >?@AII¤*()。
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