【摘要】 2017年11月18日西藏米林发生M_S6.9级强震并引发严重的次生地质灾害。为研究其地质灾害的空间分布规律,利用遥感技术提取该区域的滑坡、崩塌等灾害信息。在此基础上,引入高程、坡度、坡向、地层岩性、水系和断层等六种地震触发的地质灾害影响因素,并利用层次分析法(AHP)确定各影响因素在地质灾害易发性评价中所占权重,得到了研究区地质灾害易发性空间分布图。结果表明,该研究区地质灾害总面积达到32.77 km~2,并以中小浅层滑坡和崩塌为主,且55.6%的地质灾害位于极易发区。更多还原

【Abstract】 A strong earthquake occurred in Milin, Tibet in November 18, 2017, M_S 6.9, which caused serious secondary geological disasters. In order to study the spatial distribution law of geological hazards, remote sensing technology was used to extract landslide and collapse information in this area. On this basis, the influence factors of geological disasters triggered by six kinds of earthquake, such as elevation, slope, slope, lithology, water system and fault, are introduced, and the weight of the influence factors in the vulnerability assessment of geological disasters is determined by the analytic hierarchy process(AHP), and the spatial distribution map of the ground quality disaster is obtained. The results show that the total area of geological hazards in this study area is 32.77 km~2, and the primary and small shallow landslides and landslides are mainly in the study area, and 55.6% of the geological disasters are located in the extremely prone areas.更多还原