2021 Volume 77 Issue 2 Pages I_97-I_102
A screening method for a lot of typhoon scenarios that trigger high wave events is necessary as a preliminary step for detailed simulations using spectral method with large computational load, in order to assess the low frequency catastrophic wave risk. The significance wave method, such as SMB method, is constructed for the case of uniform wind, and it is necessary to devise the definition of representative wind speed and fetch when it is applied to typhoon. In this paper, we developed a fast model SWET, a kind of significant wave method, that can be used for wave estimation. In this study, the accuracy of SWET was verified by comparing it with the spectral method in the open sea near the Kii Channel. The results showed that the accuracy of the estimation decreased when the target area was in shallow water or when the distance between the typhoon track and the target area was large. However, the maximum wave heights can be generally estimated, and the rank correlations are high with the SWAN results. In the current model, the computational time required for wave estimation for one typhoon is about 30 seconds, which indicates the possibility of using the model as a screening method for low-frequency high wave events.
PROCEEDINGS OF COASTAL ENGINEERING, JSCE
PROCEEDINGS OF THE JAPANESE CONFERENCE ON COASTAL ENGINEERING
