30415.基于gis的地質災害危險性評價

1、蘭州大學碩士學位論文基于GIS的地質災害危險性評價姓名：楊秀梅申請學位級別：碩士專業(yè)：地質資源與地質工程地質工程指導教師：梁收運20080501ABSTRACTChinaisoneofthemostseriousgeohazardcountriesintheworldNow，ithasbeenaseriousproblemwhichcanrestricteconomicdevelopment，endangerpeople’Shealth

2、andsocialstabilization，andultimatelyinfluencesocialeconomicsustainabledevelopment，butcomprehensivehazardcontrolhaslongbeenlimitedbythefinancialabilityandtechnicallevelTherefore，geologicalhazardriskassessmentasahotissueis

3、presented，whichprovidesscientificbasisforgeologicaldisasterpreventionandcontrolhasgreatsignificanceindisasterpreventionandreduction，iscloserelatetoeconomicdevelopmentandsocialstabilityTheformationofgeologicalhazardsisaco

4、mplicatedproblemwithrichcontents，whichareuncertaintyfuzzytemporal—spacialinhomogeneitycomplicatedetcThispapertakesTaoRiverHydropowerstationinGansuastheresearchunite，adoptsthecombinationofGISwithAHPforgeologicaldisasterri

5、skassessment，whichcandevelopeachmethodfullyatspatialanalysisandmultiindexesevaluation，andinamaximumextentmakefactorsquantizationmoreeffective，subjectiveandobjectiveelementsmorereasonableBasedondetailedfieldobservationand

6、analysisoninfluencefactorsofgeologicalenvironmentalconditionsandgeologicalhazardsdevelopment，thispaperselects7factors，geomorphologicaltypes，fault，slope，landuse，populationdensityandhighwaydensityforassessmentCorresponding

7、indexesaredeterminedaccordingtoAHPthematiclayersofeachfactorareconductedandsuperimposedtotheindexwiththesupportofGIS，andfinallysubareamapistakenAccordingtotherisk，thecountryisdividedintothehi!gh—risk，medium—risk，lowriska