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从孕灾环境、自然致灾因子和承灾体3个方面选取区划指标,通过地理信息系统(GIS)空间分析,分别得到重庆市孕灾环境敏感度图、自然致灾因子危险度图和区域承灾体脆弱度图;将上述3幅图进行叠加分析,得到重庆市自然灾害区划的基本单元,然后对基本单元属性数据库的数据处理,根据拟定的区划原则,采用“自下而上”的区划定量分析方法并结合“自上而下”的区划方法对重庆市自然灾害进行区划,得到4个自然灾害区;从属性数据库中提取相关属性数据,得到每个自然灾害区的基本特征;最后,分别对每个自然灾害区的自然灾害、环境以及社会经济情况进行详细的评价.
From the three aspects of pregnant disaster environment, natural disaster-bearing factor and disaster-bearing body, the regional indicators are selected. Through GIS spatial analysis, the maps of pregnant environment sensitivity, natural hazard risk map and area According to the proposed zoning principle, the basic unit of natural disasters zoning in Chongqing is obtained by superimposing and analyzing the above three maps, and then the data of bottom-up “, And combined with” top-down "zoning method to divide natural disasters in Chongqing and get 4 natural disaster areas; extract relevant attribute data from the attribute database to get the data of each natural disaster area Basic characteristics; Finally, detailedly evaluate the natural disasters, environment and socio-economic conditions of each natural disaster area.