The typhoon No. 14 in 2002 caused storm surge damages along the coast of South Korea. Especially Masan City was heavily inundated. A numerical model to simulate the storm surge inundation in the coastal urban area has been developed. The numerical model is applicable to calculate the inundation depth, flow velocity and inundation time. In the paper, the effect of a tidal barrier to mitigate the inundation damages in the surface area and underground spaces is estimated employing the 3-D numerical model. The numerical results demonstrate the applicability of the model to design an appropriate mitigation facility.
On the September of 2003, the typhoon No.14 (Maemi) landed in the southern coast of Korean peninsula and made heavy damages in the area. The inundation in the under-ground facilities in Masan City was caused by storm surge in the typhoon. Such inundation in the underground areas happens in Ole other countries these days. The risk of inundation increase s as the population and social property is concentrated into the urban area located in the coastal and reclaimed areas. A numerical simulation model directly computing the Navier-Stokes equation using the fine 3-D grids has been developed to estimate the wave overflow of seawalls. The model is called MARS-model (Multi Advection Reconstruction Solver) and it has been already applied to the tsunami inundation in Tokyo Bay, Japan and tsunami run-up analysis in Papua New Guinea coasts. A field survey of storm surge traces in Masan City was carried out. The inundation water depth and the ground bathymetry and the dimension of underground sections were obtained during the survey. The location of Masan City and the typhoon mace were indicated with the prediction of storm surge deviation (Figure 1 referred from Kawai et al., 2005).Figure 1 shows the location of Masan City The numerical simulation of inundation due to storm surge was done employing the ground data obtained the field survey.
