Author(s): Makoto Takeda; Masaya Abe; Yusuke Nakajima; Masataka Murase; Naoki Matsuo
Linked Author(s): Naoki Matsuo
Keywords: Inundation analysis model; House; Numerical simulation Economic damage
Abstract: Recently, large scale inundation which a lot of water flows into houses has occurred. The general inundation analysis model did not take into consideration inflow into houses. In urban inundation, evaluation and countermeasures for economic damage on houses are major issue. Therefore, it is considered the importance to develop an inundation analysis model considering inflow and outflow into houses in order to estimate the damage appropriately. In this study, based on the inundation analysis on the Cartesian coordinate system, the analysis model was developed with the hydraulic model considering inflow and the outflow into houses. The discharge between land and houses was analyzed by overflow formula. And the temporal change of water level in houses was analyzed by the continuity equation. In this analysis, the inundation situation due to flood of the Shonai River in Nagoya city, Japan was calculated and the difference of urban inundation analyzed with and without house inflow model was examined. From this study, the characteristics of the proposed analysis model were shown and the validity was confirmed from the viewpoint of mass conservation. In particular, the analysis result with the house inflow model was more slowly spread than the analysis result without the house inflow model. Moreover, as the application of the proposed analysis model, the effect of houses buildup on the inundation and economic damage of houses was examined.
Year: 2020