An Evaluation and Reduction Method on Regional Earthquake Risk Using GIS Comprehensive System of Natural and Social Information

本研究从城市自然环境和社会环境两方面考察自然灾害脆弱性的成因，作为把握区域地震风险程度的基础研究。从区域自然因素和社会因素的综合角度对脆弱性进行了评价。本文提出了一种多种拓扑数据叠加的方法，即地理信息系统（GIS）的应用。结果表明：(1)研究了利用GIS技术评价自然灾害风险的可行性。(2)对人口数据、自然灾害数据和交通网络数据进行叠加分析。(3)为自然灾害基础分析提供交通网络和设施配置信息，并将该方法应用于已有研究区。(4)利用各种原因数据和GIS计算机系统对现有研究区进行脆弱性综合分析。(5)对大气污染地理信息系统进行了网络评价，展示了应用于自然灾害风险评价的可能性。如上所述，利用地理信息系统对估计震害的地区和城市进行震害评估是有用的。

In this study we examined various causes of vulnerability on natural hazards in view of both natural environment and social environment in a city as a basic research to grasp a regional risk degree of earthquakes. The vulnerability was assessed in terms of the combination among regional natural and social factors. Here we promoted an overlay method of various topological data, that is, the application of geographical information system (GIS).As a result, we can identify the following points :(1) The feasibility of an application of GIS was examined to evaluate the risk of natural disaster.(2) The analysis was available for the overlay of population data, natural disaster data and transportation network data.(3) The information of transportation network and facilities allocation was available for the basic analysis of natural disaster and the method was applied to the existing study area.(4) the comprehensive analysis of vulnerability was applied to the existing study area using the various cause data and GIS computer system.(5) Network evaluation was executed the air pollution GIS and it was showed the possibility of application to the assessment of natural disaster risks.As mentioned above, the technique using Gis is useful for the assessment of earthquake damage of the damage estimated regions and cities.