Analysis Study of High Wave Disasters in North Area of SADO Island in February of 2008

Abstract

The structures of the ports and dikes in the North-West area of SADO Island, NIIGATA Prefecture Japan were damaged by the high waves due to the two low atmospheric pressures on February 23, 2008. Especially, WASHIZAKI, KITAKOURA and SUITSU in North-East area in SADO Island were damaged by the waves. Though these areas were ordinary relatively calm area from the high waves, however the many harbor's dikes, fishing boats and houses were broken at these areas. This study simulated the wave conditions by using SWAN, and analyzed and explained why the disasters were occurred.