Abstract
Inundation analyses based on an unstructured mesh model were performed. The method gives detailed consideration to the geometrical shape of the geography and composition. Using other analytical results obtained before and after land subsidence that took place in the region, a comparison was carried out to show the influence of land subsidence on inundation damage. Results indicate the necessity for evaluating inundation damage in consideration of the future land subsidence. In addition, the current study presents a GIS-aided procedure for inundation analyses using an unstructured mesh model that facilitates production of information used for inundation analysis for sites that have undergone land subsidence over a long period.