南宁市土地生态安全评价研究-土地资源管理专业毕业论文

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1、THERESEARCHONLANDECOLOGICALSECURITYEVALUATIONOFNANNINGCITYABSTRACTLandisthebasisofmaterialandthesourceofwealthforhumanexistence，withtheincreasinglyprominentcontradictionbetweenpeopleandlandusedandenvironmentproblem，landecologicalsecurityresearchbecomemoreattent

2、ion．Inrecentyears，withthesustainedandrapiddevelopmentintheeconomicandsocialofNanning，theincreasinglydemandsforlandresourcesandtheexploitationintensity,thusbringingenormouspressureandthreatsonthelandecologicalenvironment．ThisstudytakethecityofNanningastheresearc

3、hobject，bycombingthedomesticandforeignrelatedtolandecologicalsecurityresearchasitsbasis，CombiningwiththeanalysisofNanninglandecologicalenvironmentstatusandproblems，inordertoBuildtheevaluationmodelof”environment-social·economic”，Fromtheaspectsofnaturalenvironmen

4、t,society,economytobuildNanninglandecologicalsecurityevaluationindexsystem，Usingthepoorsubtractionmethod，entropyweightmethod，andthecomprehensiveindexevaluationmethodtoevaluateandanalyzethelandecologicalenvironmentsecuritysituationinNanningduringthe2007to2014：On

5、thisbasis，usetheMatlabsoftware，throughBPneuralnetworkforecastthelandecologicalsecuritydevelopmenttrendsinNanningduringthe2015to2020；andputforwardsuggestionstoprotectthelandecologicalsecurity．Throughthisrescarcl[1，reachingthefollowingconclusions：(1)Duringtheyear

6、of2007·2014inNanning，ThewholelandecologicalsecuritysituationIntheconditionofrelativelysafe，whilePresentingthedevelopmenttrendofimprovementyearbyyear。Amongeightyearstimesin2007--2014，Thelandecologicalsecuritycomprehensivevalueale0．452452、0．37455、0．404441、0．40658

7、9、O．504845、0．552103、O．574742、0．635791：In2008thelandecologicalsecuritycomprehensivevalueislessthan0．4,thelandecologicalsecuritysituationisinaunsafesituation，andthelandecologicalsecuritylevelisIV，isthelowest；in2014thelandecologicalsecuritycomprehensivevalueislarg

8、erthan0．6，thelandecologicalsecuritysituationisinasafesituation，andthelandecologicalsecuritylevelisII，isthehighest；theremainingsixyearsofthelandecologicalsecuritycomprehensiv