VERIFICATION OF STORM SURGE CALCULATION OF TYPHOON NO. 21 IN 2018 AND THE EFFECT OF WIND ON DRIFTING

Abstract

 Typhoon No. 21 occurred in September 2018. This typhoon caused damage of storm surge to the coastal area of Osaka Bay. In addition, the drifted ships collided with the bridge of Kansai International Airport. It is necessary to consider the effect of wind during storm surges. In this study, storm surges by the typhoon were calculated for verification. A drifting prediction model considering the effects of wind was developed. Furthermore, the track of ship drifting was verified. As a result, the calculated results agree well with the observed pressure, wind speed and tide levels in Osaka Bay. As a result of comparing the calculation track of the ship and the record track, the calculated results were in good agreement with the record track. The proposed model was shown to be useful in predicting the behavior of drift during storm surges.