Author(s): Makoto Takeda; Pokharel Parameshor; Naoki Matsuo
Linked Author(s): Naoki Matsuo
Keywords: Flood; Storm surge; Overlapping; Ise Bay; Shounai river; Numerical analysis model
Abstract: The water disaster due to seawater behavior, e. g., storm surge and tsunami, causes serious hazard. The measures on storm surge are especially important because typhoon frequently strike over JAPAN. On the other hand, the measures on river flood are also important subject at typhoon striking. However, the influence of storm surge at mouth of river has not been considered to deal with the river flood. In this study, the feature of overlapping between flood and storm surge is evaluated by numerical simulation. Synthetic analysis model, which consists of 1D river flood model and H2D storm surge model, is developed in this study. To examine validity of this analysis model, storm surge analysis for 8 typhoon passed over the Ise Bay in JAPAN are investigated. By comparison between calculated water level and observed one, the analysis results show good agreement with observed data. Moreover, the validity of analysis model on river flood is shown through the realization of hydraulic conditions in Shounai river due to Tokai heavy rain occurred in 2000. Finally, overlapping between flood and storm surge is analyzed and the feature of flood behavior with dangerous property is discussed.
Year: 2005