摘要
区域地质灾害易发性评价是地质灾害早期预警的基础。为了探索区域地质灾害易发性评价方法,在枣阳市1∶5万地质灾害详细调查和数据库建设的基础上,分析地质灾害的发育分布规律及影响因素,利用Arc GIS技术结合加权信息量模型方法完成枣阳市地质灾害的易发性评价区域。研究结果为不易发区1 743. 7 km2,占全县面积的53. 12%;低易发区1 315. 72 km2,占40. 15%;中易发区126. 18 km2,占3. 85%;高易发区91. 36 km2,占2. 79%。高易发区主要分布在河流侵蚀、断裂附近和人类工程活动强烈区域。通过实例探索研究,地质灾害易发性评价由定性评价上升到定量评价。
Regional geo-hazard susceptibility assessment is the basis for early warning of geo-hazards.In order to explore the method of regional geological hazard vulnerability assessment,this paper analyzes the development and distribution of geological hazards and its influencing factors in detail on the basis of detailed investigation of 1∶50 000 geological hazards and database construction in Zaoyang City,and completes the vulnerability assessment of geological hazards in Zaoyang City by using ArcGIS technology and weighted information quantity model method.The results show that the stable area which covers 1 743.7 km^2,accounting for 53.12%of the total study area;the low grade area,which covers 1 315.72 km^2,accounting for 40.15%;the medium grade area,which covers 126.18 km^2,accounting for 3.85%,the high grade area,which is measured 91.36 km^2,taking up foe 2.79%.Highly vulnerable zones are predominantly distributed in strong areas of river erosion,near fractures and human activities.In view of that example,the assessment of the susceptibility of geological disasters is raise to quantitative evaluation by qualitative evaluation.
作者
李姗姗
谭光超
柳晓晨
刘家阔
Li Shanshan;Tan Guangchao;Liu Xiaochen;Liu Jiakuo(Hubei Institute of Hydrogeology and Engineering Geology,Jingzhou,Hubei 434020)
出处
《资源环境与工程》
2018年第4期635-641,共7页
Resources Environment & Engineering
基金
湖北省国土资源厅"湖北省襄阳市枣阳市地质灾害详细调查"项目资助
