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1、第23卷第2期生 态 学 报Vol.23,No.22003年2月ACTAECOLOGICASINICAFeb.,2003基于RS与GIS的区域景观镶嵌结构研究121徐建华,方创琳,岳文泽(11华东师范大学地理系、教育部城市与环境动态过程开放实验室,上海 200062;21中国科学院地理科学与资源研究所,北京 100101)摘要:以兰州市西固区为区域背景,以RS和GIS为技术手段,按照地貌特征将研究区划分为四个分区,运用多样指数、优势度、破碎度、分离度等指标研究区域景观镶嵌结构的数量特征;运用分形理论建立各种景观类型形态的分形结
2、构模型,以分维数为依据分析各种景观形态的复杂性;探讨控制和影响区域景观格局的主要因素。关键词:景观镶嵌结构;分形;兰州市西固区AnanalysisofthemosaicstructureofregionallandscapeusingGISandremotesensing121XUJian2Hua,FANGChang2Lin,YUEWen2Ze(1.TheKeyLaboratoryofUrban&EnvironmentGeocomputation,PRC’sDepartmentofEducation;DepartmentofGeog
3、raphy,EastChinaNormalUniversity,Shanghai200062.2.Geography&ResourcesInstituteofChinaAcademyofScience,Beijing100101).ActaEcologicaSinica,2003,23(2):365～375.Abstract:BasedontheapplicationofGIS,remotesensingandquantitativemethods,thispaperstudiesthelandscapemosaicstructur
4、eoftheXigudistrictinthecityofLanzhou.First,theregion’slandscapeofTMimagewasclassifiedintotentypesoflandusepatterns,theyare:farmland,orchard,grassland,wood2land,scatteredwoodland,bareland,waterarea,urbanarea,ruralsettlement,andindustrialareafarfromsettlement.Next,thecla
5、ssifiedinformationtogetherwithsurveyeddatawasservedastheinputsofageographicalinformationsystem.Then,adigitalelevationmodel(DEM)andlandscapemosaicmapwasprocessedinaGISenvironment,whichwasfollowedbyasubdivisionoftheregionintofourcategories:valleyarea,northernmountainarea
6、,southernmountainarea,anddaisarea.Finally,eachofthoseareaswasanalyzedintermsofdiversity,dominance,fragmentation,isolationandfractaldimension,withtheirresultsgivenbelow:(1)Duetoitsflatterrain,convenienttransportation,shortdistancetorivers,thevalleyareahasbeenrecognizeda
7、sthecenterofhumanactivities.Thisareaisrevealedwithhighvaluesinthediversityandfragmentationindicesaswellasalowdominancefigureasresultsofitsflatterrain,lowaltitudeandconvenientirrigation.Though,fewlandscapesshowstrongdominance,theirdiversityindicesareusuallylowduetomount
8、ainoussteepslopeandhighaltitude.Ontheotherhand,farmland,grasslandandwood2基金项目:国家自然科学基金资助项目(40171069);上海市教委局管基金资助项目(00
