2017 Volume 3 Issue 2 Pages A_223-A_229
On March 11, 2011, liquefaction occurred by off the Pacific coast of Tohoku Earthquake in Urayasu city, Chiba. Therefore traffic difficulties and suspension of water supply occurred and emergency water supply activity was carried out. This study focuses on this emergency water supply activity and evaluated citizen's physical burden by the transportation of the water on foot using the shortest path search and estimated preparation when support of the water supply activity decreases by calculating a queue of the water supply. As a result, about the former, we clarified that many citizens felt a severe burden by the transportation more than six minutes in then Urayasu city. Therefore, as a reduction plan of the burden, we clarified that excessive burden by the transportation more than ten minutes greatly decreased by utilizing water tanks which was reinforced against earthquakes. About the latter, we clarified that the bases of emergency water supply which take charge of water supply for around 8,000 people have risks that the time when a water wagon becomes absent and the person who can't receive water within the activity time occurred and the storage of 1L per person per day was necessary to avoid this.
