조석-해일-해파 결합 모형을 이용한 태풍 베라(5915) 시뮬레이션

Abstract

In this study the integrally coupled wave-tide-surge model was developed, and then applied to the simulation of wave - typhoon surge for typhoon Vera (5915) which is the strongest typhoon among the typhoons which struck Japan and caused the incalculable damage to Japan. JMA gave this typhoon name of Isewan Typhoon because of extensive damage. For the simulation, Grid Point Values (GPVs) of sea level pressure and air and sea surface temperature with 50 km intervals over the Northeast Asian seas were digitized by Japan Weather Association (JWA). Those values were interpolated to dense 1/12° grid resolution at one hourly interval from six hourly dataset for the coupled model. The overall marine wind fields are computed by adopting Planetary Marine Boundary Layer model (Cardone 1969) and then the typhoon model winds by Rankin vortex model (Fujita 1952) were inserted. Temporal interpolation along the typhoon track was also performed. An integrally coupled tide-surge-wave model using the identical and homogeneous mesh of unstructured grid system was used for correct resolving of the physics of wave-circulation interaction in both models. The hydrodynamic model (ADCIRC) is driven partly by radiation stress gradients that are computed using information from spectral wind wave model (SWAN) which uses the water levels and cmbient currents computed in the hydrodynamic model. Modeling methods and results are presented and dis incalculable damage to Japan. JMA gave this typhoon name of Isewan Typhoon because of extensive damage. For the simulation, Grid Point Values (GPVs) of sea level pressure and air and sea surface temperature with 50 km intervals over the Northeast Asian seas were digitized by Japan Weather Association (JWA). Those values were interpolated to dense 1/12° grid resolution at one hourly interval from six hourly dataset for the coupled model. The overall marine wind fields are computed by adopting Planetary Marine Boundary Layer model (Cardone 1969) and then the typhoon model winds by Rankin vortex model (Fujita 1952) were inserted. Temporal interpolation along the typhoon track was also performed. An integrally coupled tide-surge-wave model using the identical and homogeneous mesh of unstructured grid system was used for correct resolving of the physics of wave-circulation interaction in both models. The hydrodynamic model (ADCIRC) is driven partly by radiation stress gradients that are computed using information from spectral wind wave model (SWAN) which uses the water levels and cmbient currents computed in the hydrodynamic model. Modeling methods and results are presented and dis