AbstractA total of 14 soil samples were collected from sand dunes without scattering, and the process of tsunami-induced erosion was observed using hydraulic model experiments. The densities of vegetation roots were measured at 45 points on seven beaches along the Japanese coast. The results of the experiment confirmed that the roots of vegetation highly affected the resistance of soil against erosion. Based on this result, an erosion model based on the index alpha was proposed, and the relationship between alpha and root density was described. Then, the applicability of the proposed erosion model was investigated using numerical simulations.
Fujii, N., M. Ikeno, T. Sakakiyama, M. Matsuyama, M. Takao and Ken Mukohara. 2009. Hydraulic Experiment on Flow and Topography Change in Harbor due to Tsunami and Its Numerical Simulation, Journal of JSCE B2 (Coastal Engineering Committee), Vol.65, No.1, 291-295. (in Japanese)
Imamura, F., A. C. Yalciner and G. Ozyurt. 2006. Tsunami modeling manual(TUNAMI model). http://www.tsunami.civil.tohoku.ac.jp/hokusai3/J/projects/manual-ver-3.1.pdf
Takahashi, T., T. Kurokawa, M. Fujita and H. Shimada. 2011. Hydraulic Experiment on Sediment Transport due to Tsunamis with Various Sand Grain Size, Journal of JSCE B2 (Coastal Engineering Committee), Vol. 67, No. 2, I_231-I_235. (in Japanese)
Uda, T., T. Mochizuki, K. Fujita, K. Hirabayashi, K. Sasaki, A. Hattori, M. Fujii, W. Fukaya and O. Tairadate: Behavior of Multiple Natural River Embankments, Viscous Soil and Vegetation under Flood Flows, Public Works Research Institute Papers, Vol. 3489, pp.97-214, 1997. (in Japanese)