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将层次分析方法运用到地震次生灾害评价中,结合GIS技术,运用多源数据,以潜在地震次生地质灾害为例,选取灾害发育的主要控制性影响因素,包括致灾因素、诱灾因素、历史因素,建立地震次生地质灾害评价指标体系,并建立五级评分值标准。在此基础上利用GIS方法对基础资料进行处理和分析,通过统计、叠加、合并、分类等空间分析方法,得到地震次生灾害危险性等级评价结果。结果表明:六安地区的地震次生地质灾害危险性总体呈现从南到北递减的阶梯型分布特征。其中,较高的地区主要集中在金寨、霍山和舒城县的侵蚀中低山和剥蚀丘陵地区,且以活动断裂分布中心向两侧递减。
The AHP method is applied to the secondary earthquake disaster evaluation. Combined with the GIS technology, the multi-source data and the potential earthquake secondary geological disasters, for example, the main controlling factors of disaster development are selected, including the disaster-causing factors, the catastrophic factors , Historical factors, the establishment of earthquake secondary geological hazard evaluation index system, and the establishment of five-level score standards. Based on this, the basic data is processed and analyzed by using GIS method. The results of risk assessment of secondary hazard of earthquake are obtained through spatial analysis methods such as statistics, overlay, merge and classification. The results show that the overall risk of secondary geological disasters in the area of Lu’an presents a ladder-type distribution decreasing from south to north. Among them, the higher areas are mainly concentrated in the eroded hilly areas and erosion hills in Jinzhai, Huoshan and Shucheng counties, and decrease to the two sides by the active fracture distribution center.