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为研究滑坡涌浪灾害对库岸受灾面积的影响,以三峡库区为例,从致灾因子、孕灾环境和承灾体3方面,研究滑坡体入水产生的涌浪带来的安全风险,构建区域滑坡涌浪易损性评价指标体系及计算模型。基于地理信息系统(GIS)技术,建立三峡库区滑坡涌浪在时间和空间上的易损性可视化分析技术流程,并将其应用于滑坡灾害分布较多的重庆云阳县,计算其易损性分布,进行可视化分析。在此基础上,对8月和1月易损性局部分布进行对比分析。结果表明,8月较1月,Ⅰ级易损性区域面积增加45倍,Ⅱ级易损性区域面积增加2.2倍,Ⅲ级易损性区域面积增加1.1倍,形象地表明了高易损区域的影响范围。
In order to study the impact of landslide surge on the affected area of the reservoir banks, taking the Three Gorges Reservoir as an example, the safety risks brought by the surge of landslide body into the water are studied from the aspects of hazard factors, Constructing Index System and Computing Model of Vulnerability of Landslide in Area. Based on Geographic Information System (GIS) technology, the visual analysis technology flow of landslide surge in the Three Gorges Reservoir Area is established in time and space, and applied to the Yunyang County in Chongqing, where the landslide disaster is more distributed, to calculate its vulnerability Sexual distribution, visual analysis. On this basis, the comparative analysis of the vulnerability distribution in August and January is carried out. The results showed that in August compared with January, the area of grade Ⅰ vulnerability increased by 45 times, the grade Ⅱ vulnerability area increased by 2.2 times and the grade Ⅲ vulnerability area increased by 1.1 times, vividly showed the high vulnerable area The scope of influence.