NUMERICAL MODELING OF TSUNAMI ATTENUATION EFFECT WITH MANGROVE

Abstract

 Coastal vegetation, such as coastal forests and mangroves, has been focused on its mitigation effects as green infrastructure. However, the current numerical calculation speeds do not allow for detailed modeling of vegetation with complex root structures. In this study, we aimed to establish a low-cost calculation method for mangroves by using the porosity. The validity of the method was verified by comparing with physical experiments, and the disaster mitigation effect of a raised road was examined using the cross-sectional shape of the local site. The numerical results are consistent with the experimental results, although they are slightly underestimated.