Page 200 - 《水资源与水工程学报》2022年第6期
P. 200

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

            DOI:10.11705/j.issn.1672-643X.2022.06.25


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                 KLDMN:Q948   OPQRS:A    OTUN:1672643X(2022)06019608

                      Spatiotemporalpatternofvegetationwateruseefficiencyandits
                              influencingfactorsinManasRiverBasin,Xinjiang

                                                                                          1,2
                                                                        1,2
                                                      1,2
                                           1
                             KONGJingjing,ZANMei ,WANGXuemei ,YANGXuefeng
                       (1.SchoolofGeographicalSciencesandTourism,XinjiangNormalUniversity,Urumqi830054,China;
                         2.XinjiangLaboratoryofLakeEnvironmentandResourcesinAridZone,Urumqi830054,China)
                 Abstract:Wateruseefficiency(WUE)isthebasisofcarbonandwatercycleinecosystemandanim
                 portantecologicalindicatorforevaluatingvegetationgrowthconditions.Inordertorevealthespatiotempo
                 ralchangesofWUEofdifferentvegetationtypesinManasRiverBasin,analyzethedifferencesofWUEof
                 differentvegetationtypes,anddiscussthedrivingfactorsaffectingWUE,theWUEofManasRiverBasin
                 from2001to2019wasquantitativelyestimatedbasedonMODISdata.Moreover,thecoefficientofvaria
                 tion ,Theil-Senmediantrendanalysis,M-KsignificancetestandHurstindexwereadoptedtoanalyze
                 thecurrentsituationandfuturetrendofspatiotemporalchangesofvegetation WUE,andgeographicalde
                 tectorswereappliedtoquantitativelyanalyzetheinfluencingfactorsof WUEinthestudyarea.There
                 searchresultsshowthattheWUEintheManasRiverBasinfluctuatedbetween0.74and1.08g/(mm·
                  2
                                                                                      2
                 m)from2001to2019,andthemultiyearaverageofWUEwas0.88g/(mm·m),whichshowedan
                 overalldownwardtrend ,withadecreaseof6.82%.ThespatialdifferenceofWUEwassignificant,show
                 ingadistributionpatternofhighinthecentralandnorthernpartsbutlowinthesouthernpart;highinthe

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