基于RS和GIS的西藏昌都县地质灾害危险性评价  

Risk evalution of geological hazard based on RS and GIS in Changdu county of Tibet

作　　者：刘欢[1] 朱谷昌[1,2] 刘海利[2] 张建国[2] 欧阳华平[1] 

机构地区：[1]中南大学地球科学与信物物理学院,长沙410083 [2]有色金属矿产地质调查中心,北京100012

出　　处：《地质找矿论丛》2011年第1期102-107,共6页Contributions to Geology and Mineral Resources Research

基　　金：中国地质调查局基础调查项目<甘肃中东部重要成矿带与西藏昌都等矿集区矿山开发多目标遥感调查与监测>(编号:1212010880411)资助

摘　　要：在西藏昌都县地质灾害详查的基础上,利用ETM+,IKONOS遥感数据建立该区的地质灾害解译标志并解译,通过统计分析确定了各类地质灾害的主要影响因素,采用层次分析法和GIS技术进行地质灾害的危险性评价,并最终完成了危险性评价区划图。评价结果表明,高危险区面积占0.42%;中危险区面积占3.43%;低危险区面积占18.56%;无危险区面积占77.59%。昌都县地质灾害类型主要为滑坡、崩塌和泥石流3种,存在地质灾害隐患点205个,其中有33个大型地质灾害点,严重影响和威胁居民的生命财产安全。Based on detailed investigation of geological hazards in Changdu county,Tibet,geological hazards symbol is established by using ETM＋ and IKONOS remote-sensing data then interpretation is conducted and main influence factors for geo-hazard fatalness are analyzed statistically and the risk is evaluated by using Analytic Hierarchy Process and GIS method and finally is completed the risk assessment zoning map with high-risk area accounting for 0.42%;dangerous area 3.43%;low-risk 18.56%;non-hazardous area 77.59%.There are three major geological hazard types,namely landslide,collapse,debris-flow in Changdu county.In total 205 potential hazardous points occur of which 33 are in large size imposing certain threat to the people＇s life and property.

关 键 词：RS GIS 昌都县 地质灾害 危险性评价 西藏自治区 

分 类 号：P694[天文地球—地质学] X43[环境科学与工程—灾害防治]