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IntegratedEvaluationModelforEco-EnvironmentalQualityintheFrailEcologicalZoneinChinaPHDCandidate:Supervisor:Pro.•Introduction•ModelDevelopments1）CriteriaSelectionandQuantification2）SpatialDataModel3）IntegratedEvaluationModelBasedonGrid•ConclusionREPORTCONTENTINTRODUCTION•Introduction1）Thenecessary2）Thepresentstatus3）ThemaincontentThenecessary•Withtherapidpopulationincreaseandprogressingscientificandtechnologicallevels,humanactivitieshavegreatlychangedthelandenvironmentatanunprecedentedspeedandscale,andtheinfluencehasextendedtomorethefrailecologicalzone.Asaresult,itisofgreatsignificancetostudytheeco-systeminfrailecologicalzonesoastopromoteregionaleco-environmentalstabilityandsafety,andfurthertoprovidedecision-makingalongwithscientificevidencetoplannersandadministrators.•Inrecentyears,althoughalotofresearcheshavebeenmadeintoeco-environmentalevaluation，theworkstillisatanexploringstage．Theemphasisisputonagriculturaleco-systemevaluation,thenoncityeco-systemevaluation,andfurtheroneco-environmentalqualityevaluationofregions,landscapes,cities,andprovince.Correspondingly,manyevaluatingmethodshaveappeared，suchasintegratedevaluation，vagueevaluation，andgrayevaluation.ThepresentstatusThemaincontent•BasedonRSandGIS,andcombiningPrincipalComponentAnalysis,thispaperdesignanumericalintegratedevaluationmodelforthefrailecologicalzoneeco-environmentonthebaseofgridscale.Inthisstudy，somepointswereexploredfromevaluatingcriteriaselection,grading,valuingandinitiatingtheevaluationindexes,tospatialdatamodelmanagingandevaluationmodelconstructing.ModelDevelopments•1）CriteriaSelectionandQuantification•2）SpatialDataModel•3）IntegratedEvaluationModelBasedonGridCriteriaSelectionandQuantification•Whenevaluatingeco-environment,factorsreflectingthebasiccontentofthelocaleco-environmentshouldbeselected，includingwater-heatcondition,landform,soilandvegetation,land-use／coverstate，andhumaninterferentialability.•Itisdifficulttoapplytheselectedevaluatingindicatorsdirectly，fortheylackthecomparabilityduetovariousscalesamongcoefficients.Therefore,theevaluatedfactorsmustbetreatedquantitatively,applyingthestandardmethodtosolvetheincomparableproblem.•thevaluesrangingfrom0to10SpatialDataModel•ThespatialanalyticalmodelherereferstothemathmodelappliedinGISspatialanalysis.InGIS,themodelcanadopteithervectordatastructureorgriddatastructure.Asthefrailecologicalzonedigitalenvironmentalevaluationconcernsthemathematicalcomputationofthemulti-factorandmulti-levelmodel，gridstructureiseasiertoputintopractice.IntegratedEvaluationModelBasedonGrid•Onthebasisofsort-outmainfactors,evaluationfunctionissetupasintegratedevaluationindex.Aftergradingtheimpactofeachprimarycriteriononevaluatedtarget,PCAmethodputweightoneachfactor’scontributionratiocomparedwithrelativelittleinfluencebyexperts’subjectiveopinion.Alleco-environmentalevaluationspatialvariablesUnifythegeo-referenceGrade,valueandinitiatetheevaluationindexesConvertintostandardgriddataSyntheticallyevaluatingbymeansofspatialprincipalcomponentanalysisAchieveresultmapofeco-environmentalqualityComputeeco-environmentalQualityvariablesInEq．(2),YiisNo.principalcomponent,whileaiisitscorrespondingcontributingratio.Conclusion•Themodelbasedonspatialprincipalcomponentanalysis,issetuponthebasisofgridspacemodelandsuitableformulti-layerfactorcomputation，effectivelylowingthesubjectiveinfluenceduringevaluation．•TheevaluationtechniquesofRSandGIScombinedwithdigitalmodelcantakeintofullconsiderationtherelevancebetweenvariousspatialfactors.Thismethodcanintegratetheacquiredinformationtoputintoeco-systemanalysisthroughrelativitytheory,thustoopenanewthoughtforevaluatingeco-environmentquantitativelyinthefrailecologicalzone.