基于rs和gis的北京市生态环境评价的的研究

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1、AbstractThislectureisfocusedontheresearchofeco-environmentassessmentusingRSandGIStechnology,whoseresearchbackgroundistheprojectof“Beijingeco-environmentassessmentduring2000to2005and2006”．Theworkingwaysandmeansoftraditionaleco—environmentassessmentexistdefectsthataretakingtimeandenergy,whichmakesth

2、eperiodoftheassessmentlongerandmoredifficulttoguaranteethereliabilityanduniformityofstatisticaldataandassessmentquality．So，itcannotsatisfytherequestofenvironmentaspectinhi曲efficiency,shortperiodandprecision．Inviewofthisquestion，thisresearchproposedtheextractiontechnologyofeco·environmentinformatio

3、nbasedontheRSandGIS，andusingitintheactualassessmentwork，whichenhancedtheinformationextractionefficiency,reducedtheinformationacquisitionperiod，increasedthedataprecision．Moreover,becausetheeco．environmentiSamultiplexedsystemofnatureandsocial，whichisaffectedbymanykindsoffactors，displayedthecomplexit

4、yanuncertainty,therearemanyproblemsinthepresenteco．environmentassessmentwork．whichmadetheeco—environmentassessmentexistmanyproblems，suchastheacquisitionofdata,theselectionofappraisaltargetsystemandmode．Inthisresearch．accordingtotheeco．environmentassessmentstandardissuedbytheCountryEnvironmentalPro

5、tectionBureau，usedthebiologicalabundanceindex，thevegetationcoverindex．theindexofnetworkofriversand1akesdensity,thelanddegenerationindexandtheenvironmentqualityindexweightedtocalculatetheecologicalindexofBeijingandeachcounty,thenmadeassessmentandanalysisoftheconditionofeoo—environmentfrom2000to2006

6、．Theresultdistributedintworanksof”good”and”general”．Theindexofwholecityis59．800and59．707respectively,whichindicatestheconditionofeco-environmentis”good”，andthereisnoobviouschange，namelythecoverageofvegetationiswell，theecologymultiplicityiSricher,andbasicallysuitsthehumansurvival．Thebestecologycond

7、itioniSlocatedinmountainousareaofMiyunCounty,andworstislocatedinthefastdevelopedareaofBeijingurbandistrict．whoseeco．environmentconditionisordinaryincounties．Beijinglacksthelargescaleeco—environmentassessment．Acco