EFFECTS OF MAXIMUM WIND SPEED RADIUS AND TRANSLATION SPEED OF SCENARIO TYPHOON ON STORM SURGE AND WAVE

Abstract

 The 2018 edition of the technical standards and commentaries for port and harbor facilities in Japan recommends employing a scenario typhoon as one of accidental actions for the estimation of ocean wave and storm surge. The simulations of storm surge and wave in Shibushi Bay for various typhoons with different moving speeds and typhoon radii predicted that a typhoon with the moving speed of 50km/h slower than the speed of 73km/h estimated from Typhoon Vera in 1959 (Typhoon Ise-wan) conditionally generated more severe storm surge and wave in the bay. The simultaneous occurrence of two peaks of storm surge and wave induced most unstable state for a breakwater caisson.