Abstract
In order to clarify the effects of seawater density stratification, topography-dependent winds within an embayment, and wave set-up, on the storm surge level, we carried out a storm surge computation for the Ise-Wan Typhoon which struck the Ise Bay area in 1959. We employed a multi-level model that takes into account the density stratification and the wave set-up for the storm surge. A spectral shallow water model was employed for the wave hindcasting.
Obtained results are as follows: seawater density stratification increases the tide level deviation by approximately 20-30cm near the coast. Topography-dependent winds within an embayment causes variations of the tide level deviation by approximately 30cm. In addition, the wave set-up increases the tide level deviation by approximately 50cm on open coasts that face the ocean. By introducing these factors into storm surge computation, more accurate prediction of tide level deviations can be obtained.
