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大小:1.41 MB
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时间:2020-03-26
《秦岭中部太白县地质灾害发育特征及危险性评估.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第32卷第12期地质通报Vo1.32.NO.122013年12月GEoLoGICALBULLETINoFCHINADec.,2013秦岭中部太白县地质灾害发育特征及危险性评估王涛,吴树仁,石菊松,李滨,辛鹏WANGTao,WuShu—ren,SHIJu—song,LIBin,XINPeng中国地质科学院地质力学研究所/国土资源部新构造运动与地质灾害重点实验室,北京100081InstituteofGeomechanics.ChineseAcademyofGeologicalSciences~KeyLa
2、boratoryofNeotectonicsMovement&GeohzardsMinistryofLandandMineralResources,Bering100081,China摘要:以陕西省太白县为例,分析了秦岭中部山区地质灾害形成的地质环境条件,重点指出在植被茂密山区,异常强降雨及农耕、建房、修路和矿山开采4种人类工程活动对地质灾害的关键诱发作用。对崩塌、滑坡、泥石流和不稳定斜坡4类典型地质灾害进行了亚类细分和发育特征分析,并总结指出了地质灾害区域宏观分布特征。筛选了9种关键的地质灾害影响和
3、诱发因素,基于将集中调查区指示的地质灾害发育规律,外推应用于全区地质灾害评估的思路,利用信息量模型对太白县全区进行了地质灾害危险性定量评估.结果显示高危险区主要集中分布在县域北部人口聚居的盆地区,以及南部河流与公路沿线地段。定量检验显示,危险性评估结果与地质灾害的实际分布十分吻合,表明基于信息量模型的地质灾害危险性评估方法能够很好地适用于秦岭腹地山区。关键词:秦岭;太白县;地质灾害;信息量;危险性中图分类号:P694文献标志码:A文章编号:1671—2552(2013)12—1976—08WangT,
4、WuSR,ShiJS,LiB,XinP.CasestudyoflandslidecharacteristicsandhazardassessmentinTaibaiCounty,centralQinlingMountains.GeologicalBulletinofChina,2013,32(12):1976—1983Abstract:TakingTaibaiCountyinShaanxiProvinceasanexample,thispaperhasanalyzedgeologicalenviron
5、mentconditionsoflandslidesincentralQinlingMountains.Itisemphasizedthatinthemountainousareaunderthickvegetation,unusualtorrentialrainand4kindsofhumanengineeringactivitiescomposedoffirming,housebuilding,roadconstructionandminingengineeringplaycrucialroles
6、intriggeringlandslides.4typicallandslidetypes,i.e.,collapse,landslide,debrisflowandunstableslope,aredistinguishedandana—lyzed,andregionalmacroscopicdistributionoflandslideissummarized.9majorfactorsinfluencingandtriggeringlandslideareextract-ed.Quantifie
7、dlandslidehazardassessmentbasedoninformationcontentmodelwithinTaibaiCountywascarriedOUtbasedonthethoughtofapplyinglandslidedevelopingpatternofthedetailedinvestigatedareatowholeregionalassessment.Theresultshowsthatthehighhazardzonesmainlylieintheresident
8、ialareaofnorthernbasinandlocalareasalongsouthernriverandroadinthecounty.Thequantitativeverificationresultshowsthatthishazarddistributionfeatureisconsistentwiththerealdistributionoflandslides.Itisindicat—edthatthelandslidehazardas
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