Estimation Method of Amount of Tsunami Disaster Wastes during the 2011 off the Pacific Coast of Tohoku Earthquake

A huge amount of disaster wastes was accumulated along coastline areas of the Tohoku region by tsunami dur ing the 2011 off the Pacific coast of Tohoku Earthquake. Th e total amount of tsunami disaster wastes was estimated to be 26.7 million tons. This corresponds to 50 % of the total amount of the waste of Japan in 2009. Tohoku Earthquake caused widespread serious damage. Since the coastal area o f Tohoku region shapes a saw-toothed coastline, it is difficult to prepare large places for filling these disaster wastes. And a road for carrying to these treatment facilities i s not enough in Tohoku coast line area, most port facilit ies were damaged seriously. This means the dispose of disast er wastes is in extremely difficult in Tohoku region. Since a tsunami height in Shikoku region during nex t Tokai Earthquake or Nankai one will be larger than the Tohoku Earthquake, it can be anticipated that an am ount of disaster wastes in Shikoku is also very large. It i s very important to estimate an amount of tsunami disaster wastes for quick recover and revival of damaged areas. This paper describes a method of wastes amount estimation based on the officially announced data a nalyzed in GIS platform.