TY - JOUR
T1 - Hydraulic and numerical study on the generation of a subaqueous landslide-induced tsunami along the coast
AU - Shigihara, Yoshinori
AU - Goto, Daichi
AU - Imamura, Fumihiko
AU - Kitamura, Yuichi
AU - Matsubara, Takayuki
AU - Takaoka, Kazuaki
AU - Ban, Kazuhiko
N1 - Funding Information:
Acknowledgements This study was partially supported by the Grant-in-Aid of the Ministry of Education, Science and Culture, Japan (No.12574016 and No.14080203).
PY - 2006/10
Y1 - 2006/10
N2 - By carrying out the hydraulic experiments in a one-dimensional open channel and two-dimensional basin, we clarified the process of how a landslide on a uniform slope causes the generation of a tsunami. The effect of the interactive force that occurs between the debris flow layer and the tsunami is significant in the generation of a tsunami. The continuous flow of the debris into the water makes the wave period of the tsunami short. The present experiments apply numerical simulation using the two-layer model with shear stress models on the bottom and interface, and the results are compared. The simulated debris flow shows good agreement with the measured results and ensures the rushing process into the water. We propose that the model use a Manning coefficient of 0.01 for the smooth slope and 0.015 for the rough slope, and a horizontal viscosity of 0.01 m2/s for the landslide; an interactive force of 0.2 for each layer is recommended. The dispersion effect should be included in the numerical model for the propagation from the shore.
AB - By carrying out the hydraulic experiments in a one-dimensional open channel and two-dimensional basin, we clarified the process of how a landslide on a uniform slope causes the generation of a tsunami. The effect of the interactive force that occurs between the debris flow layer and the tsunami is significant in the generation of a tsunami. The continuous flow of the debris into the water makes the wave period of the tsunami short. The present experiments apply numerical simulation using the two-layer model with shear stress models on the bottom and interface, and the results are compared. The simulated debris flow shows good agreement with the measured results and ensures the rushing process into the water. We propose that the model use a Manning coefficient of 0.01 for the smooth slope and 0.015 for the rough slope, and a horizontal viscosity of 0.01 m2/s for the landslide; an interactive force of 0.2 for each layer is recommended. The dispersion effect should be included in the numerical model for the propagation from the shore.
KW - Hydraulic experiment
KW - Landslide
KW - Shear stress term
KW - Tsunami
KW - Wave frequency dispersion
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U2 - 10.1007/s11069-006-0021-y
DO - 10.1007/s11069-006-0021-y
M3 - Article
AN - SCOPUS:33947321539
SN - 1433-6863
VL - 39
SP - 159
EP - 177
JO - Handbook of Environmental Chemistry, Volume 5: Water Pollution
JF - Handbook of Environmental Chemistry, Volume 5: Water Pollution
IS - 2
ER -