Tsunami inundation damping performance of mangrove based on two-dimensional numerical simulation

The mangrove parameters such as tree density and biomass of the mangroves were estimated based on the imagery analysis. Then, the form drags of the stilt root coefficient in inundation flow was calculated based on the mangrove parameters by a stilt root morphology model. Two-demensional numerical simulation results showed the mangroves reduced hydrodynamic force by 55%, and the stilt root contributed 60% to this reduction. The stilt root was a vital component to reduce the hydrodynamic force in mangroves. Hydrodynamic force reduction was shown to progress with buffer distance and the density of mangroves present. The functional mangrove buffer distance was more than 200 m.