摘要
以具有典型性和代表性的四川省丹巴县城为重点研究案例,对西南山区城镇地质灾害易损性评价方法进行了较系统的探索。针对西南山区城镇的特点,提出了地质灾害承灾体的调查方法,构建了地质灾害易损性大比例尺评价的指标体系和评价模型,介绍了利用ILWIS软件进行地质灾害易损性评价的技术方法。易损性评价结果表明,丹巴县城区地质灾害易损性较高的地区主要为学校、居民小区等人口集中、物质经济价值大的地段。研究区内具有极低易损性(易损性值在0～0.25之间)的承灾体面积占整个研究区面积的96.48%,具有低易损性(易损性值在0.25～0.50之间)的承灾体面积占3.21%,具有中等易损性(易损性值在0.50～0.75之间)的承灾体面积占0.29%,而具有高易损性(易损性值在0.75～1之间)的承灾体面积仅占0.02%。
In this paper, we′ve conducted an in-depth and systematic research on the vulnerability assessment of geo-hazards in southwest mountainous towns with typical and representative selection of Danba County town in Sichuan Province as a key case study. According to characteristics of southwest mountainous towns, this paper put forward the investigation methods of geo-hazards affected objects in southwest mountainous towns, and established index system and model of vulnerability assessment of geo-hazards in large scale, meanwhile, the paper introduced the method of assessing vulnerability based on the ILWIS software. Vulnerability assessment re-sults indicated that the higher vulnerability areas in Danba County town were primary schools, residential quarters and other places in which there was dense population and prosperous material economic value. Area with very low vulnerability （value between 0-0.25） accounts for 96.48% of the total study area. Area with low vulnerability （value between 0.25-0.50） accounts for 3.21% of the total study area. Area with moderate vulnerability （value between 0.50-0.75） accounts for 0.29% of the total study area. Area with high vulnerability （value between 0.75-1） only accounts for 0.02% of the total study area.
出处
《地质通报》
CAS
CSCD
北大核心
2010年第5期729-738,共10页
Geological Bulletin of China
基金
中国地质调查局<西南山区城镇建设地质灾害风险管制方法及示范>项目(编号:1212010814015)资助
关键词
西南山区城镇
丹巴县城
地质灾害
易损性评价
southwest mountainous towns
Danba County town
geo-hazards
vulnerability assessment
