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

本研究从城市的自然环境和社会环境两个方面探讨了城市自然灾害脆弱性的各种原因，作为掌握区域地震危险度的基础研究。从区域自然因素和社会因素的组合角度对脆弱性进行了评估。本文提出了一种多种拓扑数据的叠加方法，即地理信息系统（GIS）的应用，其结果是：（1）探讨了GIS在自然灾害风险评估中应用的可行性。(2)该分析可用于人口数据、自然灾害数据和交通网络数据的叠加。(3)该方法可为自然灾害的基础分析提供交通网络和设施配置的信息，并将其应用于现有研究区。(4)利用各种成因数据和GIS计算机系统，对现有研究区进行了脆弱性综合分析。(5)利用大气污染地理信息系统（GIS）进行了网络评价，表明了其在自然灾害风险评估中应用的可能性，为震害预测区域和城市的震害评估提供了一种有效的技术手段。

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.