Volcanic Mitigation Systems Revised by Volcanic Risk Assessments and New-generation Hazard Maps Based on GIS Database of Volcanic Disasters

基于人口密度和其他社会基础设施的地理信息系统数据库，通过危险性、脆弱性和潜在的风险损失来评估纳苏活动火山区的火山风险。由于许多旅游设施位于纳苏火山西南20公里范围内，火山区的风险值估计很高。由于日本人口密度高，土地利用率高，这往往会将一些地区开发为居住空间，甚至靠近火山的地区也是如此。因此，迫切需要对活跃的火山区进行危险地图和风险评估，以便从中长期角度进行有效的火山灾害管理。

Based on the GIS database of the population density and other social infrastructures, volcanic risk at Nasu active volcanic area was assessed by the hazard, vulnerability, and potential loss at risk. As many tourist facilities are located within 20km SW of Nasu volcano, the risk values are estimated to be high scores at the volcanic area. Because Japan has a high population density and a high land use, this often develops areas as living spaces, even areas close to the volcanoes. Consequently, the hazard map and risk assessment of the active volcanic areas are urgently needed for effective volcanic disaster management in a medium- and long term perspective.