CHARACTERISTICS OF STORM SURGE DAMAGES CAUSED BY TYPHOON 9918 IN SUO-NADA SEA

Abstract

The Typhoon No. 18 in 1999 caused serious dameges along the Suo-nada sea in Yamaguchi prefecture. In the present paper, the histories of tidal levels and sea wave induced by the typhoon were simulated with the Myers and MASCON model respectively. The wave presures on coastal dikes at eleven representative points were deduced according to the tidal levels and wave heights simulated for instant of damage. The mechanism of sliding, overturning and cutting of sea walls and coastal dikes was studied on the basis of analyzing variation of tidal levels and wave heights.