摘要
四川省会理县的地貌条件、地质条件和水文气象条件为地质灾害发育提供了良好基础,县域内地质灾害频繁。2008年8月30日("8.30")地震不仅加剧了原有的地质灾害,而且还引发了多处新的地质灾害点。通过发放地质灾害普查表、典型区域的遥感调查和重点区域的专家详查等调查方法,获得地震诱发的新增地质灾害隐患点55处,其中崩塌8处、滑坡25处、泥石流2处和不稳定斜坡20处,新增灾害点主要集中在县域南部高山峡谷区,特别是沿金沙江一带。根据震后地质灾害的调查结果,以2km×2km为单元格对县域内地质灾害易发程度进行分区,主要分为三级地质灾害易发区:高易发区、中易发区、低易发区,分别占全县总面积的42.4%,37.1%,20.5%。最后,提出了建立群测群防网络及监测预警系统实施全面防灾、突发性地质灾害实施紧急防治、重要地质灾害隐患点实施综合防治、加强地质环境管理和实施预防减灾等防治对策。
Due to complex geological,geomorphic,and hydro-meteorological conditions,numerous geo-hazards occur in Huili County. The ＂8·30＂ earthquake induced a large number of new geo-hazards,as well as the intensification of old hazards in Huili County. With the help of sending geo-hazard census list,remote sensing,and expert inquiry,55 new geo-hazards triggered by the ＂8·30＂ earthquake are identified,including 8 rock-falls,25 landslides,2 debris-flows,and 20 unstable slopes,which are mostly in the south of the county,particularly in the region of Chinsha River. Based on the results from survey,the zoning on susceptibility level of geological disasters in Huili County is made in a unit grid of 2 km×2 km. The areas of high-susceptibility,mid-susceptibility,and low-susceptibility occupy 42.4%,37.1%,and 20.5% of the total area of the county,respectively. Additionally,some countermeasures are proposed,including setting a network of disaster prevention and mitigation,making the emergency treatment of some sudden hazards or the comprehensive treatment of important geological hazards,and enhancing the preventive management of geo-environmental disasters.
出处
《水土保持通报》
CSCD
北大核心
2010年第4期143-147,共5页
Bulletin of Soil and Water Conservation
基金
国家重点基础研究(973)发展计划项目"汶川地震次生山地灾害形成机理及风险控制"(2008CB425802)
