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As a result of recent climate change, flood damage originating from local floods and typhoons has become more frequent, costing many lives and damaging property. Especially in city centers, a large amount of damage can occur due to inundation caused by river flooding. In this study, flood damage area was calculated using the Flo-2D flood inundation model, and the estimated flood damage was calculated using multi-dimensional flood damage analysis. In general, the flood damage rate can be calculated using the area ratio according to the land use in the affected administrative district. However, in this study the flood damage rate was calculated using the flood damage rate proposed in the multi-dimensional flood damage analysis. The estimated flood damage as a function of return period were estimated using the estimated flood damage rate. The flood damage rate estimated using the area ratio was estimated to be at least 51% with a maximum 75% lower than the flood damage rate estimated using the building group, and the total damage was underestimated when the area ratio was used. Therefore, it is necessary to estimate damages using building inventories presented in the multidimensional law for residential and industrial areas.

ESTIMATION OF FLOOD DAMAGE USING BUILDING GROUP INVENTORY AND MULTIDIMENSIONAL FLOOD DAMAGE ANALYSIS