我国沿海城市海底地质灾害易损性评价

Evaluation on Submarine Geological Hazard Vulnerability of Coastal Cities in China

为了解我国沿海海底地质灾害易损性相对分布状况,在阐述海底地质灾害易损性含义和特征的基础上,设计包含15个指标的海底地质灾害易损性评价体系,借助层次分析法(AHP)确定指标权重,计算我国沿海53座地级以上城市的社会经济易损性。结果表明:我国沿海53座地级以上城市只有深圳市处于较高易损区;大连、上海、福州、宁波、广州、汕头、湛江等7座城市处于中等易损区,沧州、丹东、锦州、营口、盘锦、葫芦岛、杭州、绍兴、滨州、东莞、防城港、钦州、三亚等13座城市处于很小易损区,其余32座城市在较小易损性的范围内。为降低沿海城市海底地质灾害易损性,必须采取有效的防治措施。

In order to learn the distribution of submarine geological hazard vulnerability of coastal cities in China,an index evaluation system and model for submarine geological hazard vulnerability is firstly presented based on the analysis of the concept and the characteristics of submarine geological vulnerability,which includes 15 indicators.In this model,the weight of each indicator is determined by using the Analytic Hierarchy Process（AHP）.Then,the model is used to evaluate the social and economic vulnerability of 53 coastal cities in China.The results show that only Shenzhen belongs to the higher vulnerability area,Dalian,Shanghai,Fuzhou,Ningbo,Guangzhou,Shantou and Zhanjiang belong to middle vulnerability area,Cangzhou,Dandong,Jinzhou,Yingkou,Panjin,Huludao,Hangzhou,Shaoxing,Binzhou,Dongguan,Fangchenggang,Qinzhou and Sanya belong to the lowest vulnerability area,and the rest of 53 coastal cities belongs to the lower vulnerability area.Some effective measures must be taken in order to decrease the submarine geological hazard vulnerability of coastal cities.