Page 52 - 《水资源与水工程学报》2024年第2期
P. 52

!35 "!2 #                         & ' ( ) & * + , -                               Vol.35No.2
               2024 $ 4 %               JournalofWaterResources&WaterEngineering                 Apr.,2024

            DOI:10.11705/j.issn.1672-643X.2024.02.06


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                 GHIJK:X824   LMNOP:A    LQRK:1672643X(2024)02004812
                  Impactoflanduseandlandscapepatternonwaterqualityonmultiple

                      temporalandspatialscalesintheThreeGorgesReservoirarea

                                                                           2
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                                      1
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                            ZHAOCan,LIYi,WULeixiang,HUANGWei,GUANRonghao
             (1.CollegeofWaterResourcesandArchitecturalEngineering,NorthwestA&FUniversity,Yangling712100,China;2.Departmentof
                  WaterEcologyandEnvironment,ChinaInstituteofWaterResourcesandHydropowerResearch,Beijing100038,China)
                 Abstract:Toinvestigatetheresponseofwaterqualitytolanduseandlandscapepatternofdifferent
                 scales,thisstudyanalyzedthespatialandtemporalheterogeneityofwaterqualityandthecharacteristics
                 oflanduseandlandscapepatternsinmultiscaleriparianbufferzonesbasedonthehydrologicalandwater
                 qualitydataofseventransectsintheThreeGorgesReservoirareafrom2019to2021andthelanduseda
                 tain2020.Correlationanalysisandredundancyanalysis (RDA)werealsousedtodeterminetheeffects
                 oflanduseandlandscapepatternsonwaterqualityindicatorsandtheoptimalscaleofinfluence.Then,
                 partialleastsquaresregression(PLSR)wasusedtoexplorethekeyinfluencingfactorsundertheoptimal
                 scaleofinfluence.TheresultsshowthattheoverallwaterqualityconditionintheThreeGorgesReservoir
                 areawasstable ,thewaterqualityinthedrywaterperiodwasbetterthanthatinthewetperiod,andthe
                 waterqualityconditionwasmainlyaffectedbynonpointsourcepollution,tributaryconfluence,thephos
                 phorusindustryandurbanization.Furthermore,thelandscapepatchesinthesmallscalebufferzonewere
                 severelyfragmented ,butmorediversified;cultivatedlandwasthedominantlandscapetypeinthereser
                 voirarea ,anditsincreasedfragmentationwasconducivetoimprovingtheaquaticenvironment;forestand
                 grasslandhadabetterpurifyingeffectonthewaterenvironmentinthedryperiodthaninthewetperiod ,

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