基于ANUSPLIN和InVEST模型的湘江流域水源涵养时空动态研究

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中图分类号：TV21 文献标识码：A 文章编号：1001-9235（2025）07-0074-12

Abstract：Climatechangeandhumanactivitieshavehadasignificantimpactonwaterconservationwithinthebasinandanindepth studyofthespatialandtemporaldynamicsofwaterconservationwitinthebasinisessntialforunderstandingthepatenofhange anddevelopingcoresponding management strategies.Thisstudyevaluatedthe simulationresultsof the Xiangjiang River Basinat diferentspatialandtemporalscalesfrom1991to020basedontheANUSPLINinterpolationprecipitationdataandtheInVEST modelandexploredthespatialandtemporaldynamicsofwaterconservationwithinthebasin.Theresultsof thestudyshowthat： ① the ANUSPLINprecipitationinputdrivenInVESTmodelshowsgoodsimulationresultsatdiferenttimesalesitheXiangjiangRiver Basin （annual water yield， NSE=0.792 ; seasonal water yield，NSE ε=0 . 734）. ② Precipitation （slope=-3.053mm/a ，water yield （ slope=-4.028mm/a ），and baseflow （slope =-4 167mm/a ）in Xiangjiang River basin from1991 to 202O showan overall decreasing trend; evapotranspiration （slope .638 mm/a） and surface runoff （slope Θ=Θ0 364mm/a ）showan overall increasing trend. ③ The annualwateryieldintewestepartoftheXiangjangRiverbasinislowandhowsasignifiantdereasingtrend，andthelocal baseflowexhibitsadecreasingtrendtovaringdegrs，whiletheannualwateryieldintesouthenpartofthebasiandtheaste edgeof thebasinisrelativelyhigh. ④ Spatial and temporal dynamics of water conservationand land use types within the basin over a 30-yearperiodshow thattheshiftfromnaturalcovertolanduseforproductionandliving wouldlead toareductionin water conservationcapacity.Thisstudycanprovideabasisforthedevelopmentofefectivewaterresourcemanagementandclimate adaptation strategies.

KeyWords： waterconservation;ANUSPLIN; InVESTmodel; spatialandtemporaldynamics; Xiangjiang River Basin

水源涵养作为流域水资源供给能力的综合体现，反映了降水、蒸发、径流及地下水补给等水文过程的综合作用，是评估流域水循环平衡和可持续性的关键指标[1-2]。（剩余13532字）