| 高山峡谷区地质灾害危险性评价 |
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| 引用本文： | 易靖松,王峰,程英建,张勇.高山峡谷区地质灾害危险性评价[J].中国地质灾害与防治学报,2022,33(3):134-142. |
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| 作者姓名： | 易靖松 王峰 程英建 张勇 |
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| 作者单位： | 1.中国地质调查局地质灾害防治技术中心/中国地质科学院探矿工艺研究所，四川 成都 611734 |
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| 基金项目： | 中国地质调查局地质调查项目（DD20190643） |
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| 摘 要： | 针对崩塌、滑坡和泥石流等灾种齐全的高山峡谷区，选取四川省阿坝县为研究区，采用多灾种耦合的评价思路，开展地质灾害危险性精细化评价。崩塌、滑坡等斜坡类灾害危险性评价以栅格为评价单元，泥石流灾害危险性评价以流域为评价单元。基于信息量模型和层次分析法，分别开展危险性评价，进而采用取大值的方法，获取研究区综合地质灾害危险性评价结果。研究表明，工作区综合地质灾害极高危险区、高危险区面积明显大于单灾种评价结果，极高危险区、高危险区主要位于崩塌、滑坡较发育的碎裂岩区域和极度易发的泥石流流域。针对高山峡谷区地质灾害危险性评价，多灾种耦合的评价思路能更合理的反映不同类型灾害在形态及空间上的差异，获取更精确的危险性评价结果。
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| 关 键 词： | 信息量模型 流域单元 多灾种耦合 层次分析法 |
| 收稿时间： | 2022-02-08 |
Study on the risk assessment of geological disasters in alpine valley area: A case study in Aba County,Sichuan Province |
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| Affiliation: | 1.Technical Center for Geological Hazard Prevention and Control, CGS/Institute of Exploration Technology, CAGS, Chengdu, Sichuan 611734, China2.Chengdu Hydrogeology and Engineering Geology Center of Sichuan Bureau of Geology and Mineral Resources/Sichuan Huadi Construction Engineering Co. Ltd., Chengdu, Sichuan 610036, China |
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| Abstract: | The geological hazard assessment was carried out by the evaluation train thought the study area of multiple disaster species coupling , which has a complete range of disasters such as collapse, landslide and debris flow. The evaluate unit of collapse, landslide and other slopes are grids and the debris flow disasters evaluate units are watershed, Based on the information model and analytic hierarchy process, the risk assessment is carried out respectively, then, the comprehensive geological disaster risk evaluation results of the study area were obtained by taking the method of large value. In the study area, the area of extremely high and high risk area of comprehensive geological disaster is obviously larger than that of the evaluation results of single hazard. The extremely high and high risk area is mainly located in the cataclastic rock area with relatively developed collapse and landslide and extremely prone debris flow basin. In view of the risk assessment of geological disasters in high mountains and valleys, the idea of dividing first and combining later can more reasonably reflect the morphological and spatial differences of different disaster types in the process of risk assessment, and obtain more accurate risk assessment results. |
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