Simulation of Storm Surge in Seto Inland Sea with Wind Field Estimated by Empirical Typhoon Model and Mesoscale Model

Abstract

The marine surface wind field in recent major six typhoons over Seto Inland Sea was estimated by using 2D empirical typhoon models, the MASCON model, and the Mesoscale Model MM5 with GPV data and typhoon bogus. Among these models the MM5 estimated the wind field most precisely and improved storm surge estimation. The empirical model taking account of typhoon forwarding into the gradient wind equation and super gradient wind into the wind speed reduction coefficient gave the better wind speed variation with time near the typhoon center than the empirical model taking the sum of gradient wind and typhoon forwarding vectors. The MASCON model overestimated the effect of land topography on the horizontal wind component and consequently underestimated the wind speed.

A Study on the Improvement of Wave and Storm Surge Predictions Using a Forecasting Model and Parametric Model: a Case Study on Typhoon Chaba

“…We generated the blended meteorological field by combining the wind and surface pressure fields along typhoon eye obtained from a parametric tropical cyclone model with MPAS track and those fields surrounding the typhoon produced by MPAS. According to the previous studies (Kawaguchi and Kawai, 2007;Tanemoto and Ishihara, 2013), the combined vari- ables v c are obtained from Eq. ( 1):…”