Numerical Analysis of Inundation Flow due to Heavy Rainfall in Amami Oshima Island

A numerical analysis of the 2010 heavy rainfall event on Amami-Oshima Island revealed that inundation flows in the Sumiyo River Basin could be accurately reproduced using solely rainfall data, despite limited observation records. The study confirmed that levee failure along the Hiya River expedited water level rise in the Nishi-Nakama district, while mangrove forests at the river mouth had no significant impact on upstream flooding. This finding underscores the potential of numerical modeling to predict inundation processes in data-scarce regions, offering critical insights for flood risk assessment and mitigation strategies.

HASHIMOTO, A., KAWAI, K., & TAI, A. (2015). NUMERICAL ANALYSIS OF INUNDATION FLOW DUE TO HEAVY RAINFALL IN AMAMI OSHIMA ISLAND. Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering), 71(4), I. https://doi.org/10.2208/jscejhe.71.i_1453