【摘要】 对南通市的地震、塌岸、水土流失、水灾、旱灾、雹灾、寒害和台风等8种自然灾害进行了详细的分析和研究,初步得出了南通市自然灾害的时空分布特点。在此基础上,从自然致灾因子危险性和承灾体易损性2个方面选取评价指标,通过GIS软件分析分别得到南通市自然致灾因子危险性分区图和社会经济易损性分区图,叠加后生成南通市自然灾害风险区划基本单元,采用自下而上的定量区划方法,合并得到自然灾害风险区划图,最后分别论述了每个风险区的自然灾害和社会经济的特征。更多还原

【Abstract】 Taking earthquake,collapse,water and soil loss,flood, drought,hail,cold disaster and typhoon as study objects,the authors get the laws and characteristics about time-space distribution of natural disasters in Nantong city preliminarily.On the basis of the analyse of space-time laws,assessment indices from hazard property of natural disaster-causing factors and vulnerability of natural disaster bodies are selected,the map of natural hazards and the map of vulnerability of social economy were produced by using geographical information system analyzing.The basic units of natural disaster risk regionalization also can be produced by overlaying the two produced maps.Adopting the bottom-up regionalization method and combining the basic units from bottom to up,the map of natural disaster risk regionalization and three risk regions can be obtained.The characteristics of every risk regions were discussed in details in the last.更多还原