Page 44 - 《水资源与水工程学报》2025年第2期
P. 44

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

            DOI:10.11705/j.issn.1672-643X.2025.02.05


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             (1. Ø!F[lZ IŸIEZ%, Ø! Á§ 625014;2. c:IŸÖº¯h3¢¥*ÙÚ®¼§¨!, 3_ ·× 430010)
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                 FGHIJ:TV213.4;P467;F301.2   KLMNO:A    KPQJ:1672643X(2025)02004009
                    Responsesofblueandgreenwatertoclimatewarmingwettingand

                           vegetationgreeningintheYangtzeRiverSourceRegion

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                         ZHUMengyu,NIFuquan,DENGYu,RENHuazhun,WANGYuxuan,
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                                   WUMingyan,YUEZiying,JIANGNan,WENWei
             (1.CollegeofWaterConservancyandHydropowerEngineering,SichuanAgriculturalUniversity,Ya’an625014,China;2.Riverand
                   LakeProtectionandConstructionSafetyCenterofChangjiangWaterResourcesCommission ,Wuhan430010,China)
                 Abstract:TheYangtzeRiverSourceRegion(YRSR)issituatedinaclimatesensitivezone,whichis
                 vulnerabletoglobalclimatechangeandhumanactivities.Thecriticalvariationsinitsblueandgreenwa
                 terresourceshaveaprofoundimpactonthemanagementandsustainabledevelopmentofwaterresources
                 acrosstheentireYangtzeRiverBasin.Weinvestigatedthespatiotemporalresponsesofblueandgreen
                 watertoclimatewarming-wettingtrendsandvegetationgreeningunderlandusechanges ,usingthesoil
                 andwaterassessmenttool (SWAT)model.Fourcombinationscenariosconsideringclimatewarming-
                 wettingandvegetationgreeningwereestablishedforquantitativeanalysis.Theresultsindicatethatpre
                 cipitationandmeantemperatureintheYRSRexhibitedsignificantupwardtrendsfrom1981to2020.
                                             2
                 During1990-2020,7,842.7km ofunusedlandwasconvertedtograssland,whiletheleafareaindex
                 (LAI)showedanonsignificantincreasingtrend.Underthecombinedeffectsofclimatewarming-wet
                 tingandvegetationgreening ,bothblueandgreenwaterinthebasinincreased,withclimatewarming-
                 wettingdominatingthehydrologicalchanges ,contributing70.24% and96.28% toblueandgreenwater
                 variations ,respectively.Thewarmerandwetterclimatenotonlypromotedvegetationgreeningbutalsoin
                 directlyenhancedwaterresourcesavailability.Meanwhile ,vegetationgreeningacceleratedtheconversion
                 ofbluewatertogreenwater,indicatingthatincreasedvegetationcoverageoptimizedwaterresourcesdis
                 tributionwithinthebasin.

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