Tsunami evacuation rules are studied using an optimization model. From the calculations so far, if there are many vehicles in the flooded area, cars must avoid using the shortest roads to the inland area and left the capacity for the walking evacuee within walking distance of the evacuation site. Designation of one-way roads are also effective. If there are fewer vehicles than evacuees in the flooded area, it is necessary to send vehicles from the inland area to board the evacuees in the coastal area, and to leave a route for the car in that direction.
Due to population decline and aging of buildings, facilities, presently designated as evacuation sites from disasters, may be abolished or buildings may be renewed, and as a result, it may be difficult to evacuate local residents. Therefore, when considering the renewal or abolition of elementary and junior high schools that have reached the end of their useful life, local governments should consider the function of evacuation shelters for residents in the event of a flood, in addition to the convenience of commuting to school during normal times. An optimization model is studied for facility update and abolition plan.
Okumura, M. and Ito, W. (2018) A Statistical Analysis of Japanese Inter-Prefectural Migration After Disasters, Journal of Disaster Research, Vol.13 No.6, pp. 1072-1081, doi:10.20965/jdr.2018.p1072
Okumura M. and Kim J. (2018) Transportation in Disasters: Lessons Learned from GEJE 2011, in Junyi Zhang and Cheng-Min Feng (eds.) "Routledge Handbook of Transport in Asia", Routledge, ISBN 978-1-13882-601-4, pp.202-245.(Chapter 8) ,doi:10.4324/9781315739618
Okumura M. and Yamaguchi H. (2018) Personal Purpose Inter-Regional Travels: An Integrator of Historical Inter-Regional Migrations, in Kakuya Matsushima and William Anderson (eds.) "Transportation, Knowledge and Space in Urban and Regional Economics", Edward Elgar Publishing, ISBN 978-1-78536-605-5, pp.286-298.(Chapter 12), doi:10.4337/9781785366062
Okumura M. (2017) Adaptation Strategies for Risk and Uncertainty: The Role of an Interdisciplinary Approach Including Natural and Human Sciences, in Tetsuya Hiyama and Hiroki Takakura (eds.), "Global Warming and Human-Nature Dimension in Northern Eurasia", Springer Publishing, pp.197-206. doi:10.1007/978-981-10-4648-3