2024 Volume 80 Issue 17 Article ID: 24-17158
Mangroves have tsunami attenuation and coastal erosion prevention effects. Yamamoto et al. (2015) compared erosion experiments with calculations using a planar two-dimensional model and showed that the model was sufficiently accurate with respect to topographic changes, but three-dimensional calculations are required for more detailed studies. Regarding the tsunami attenuation effect of mangroves, Yoshida et al. (2023) demonstrated the validity of numerical simulations by modeling mangroves using the Dupuit-Forchheimer rule, which is computationally inexpensive in three-dimensional calculations. In this study, using the same modeling method as that used by Yoshida et al. (2023), we conducted sediment transport calculations behind mangroves, comparing them with hydraulic model experiments and examining the effects of resistance coefficients. Similarly to the experiments, erosion behind the mangroves was small, while erosion was significant in other areas.
