NUMERICAL MODELING OF TSUNAMI INUNDATION USING SUBGRID SCALE URBAN ROUGHNESS PARAMETERIZATION
AbstractThe importance of accurate numerical modeling of tsunami inundation in an urban area has clearly realized due to the devastating damage from 2011 Tohoku Earthquake Tsunami. Although, numerical inundation simulations using high resolution topography data (O(1m)), the medium resolution tsunami inundation model (O(10m)-O(100m)) needs and useful for tsunami hazard assessment. This study develops and validates a numerical model of tsunami inundation using upscaled urban roughness parameterization: Drag Force Model (DFM) which deals with the effect of structures as drag force acting on flow based on physical modeling. The validation of the DFM reveals that the DFM can express the effect of the flow direction and inundation ratio.
Aburaya, T., Imamura, F. (2002), The proposal of a tsunami run-up simulation using combined equivalent roughness, Annual Journal of Coastal Engineering, 49, 276-280 (in Japanese).
Fukui, N., Mori, N., Goda, K. (2018), Application of numerical modeling of tsunami inundation using upscaled urban roughness parameterization - Case of 2011 Tohoku Earthquake Tsunami in Onagawa -, Journal of Japan Society of Civil Engineers Ser. B2 (Coastal Engineering), 74(2), I187-I192 (in Japanese)
Goda, K., Yasuda, T., Mori, N., Mai, P. M. (2015). Variability of tsunami inundation footprints considering stochastic scenarios based on a single rupture model: application to the 2011 Tohoku earthquake. Journal of Geophysical Research: Oceans, 120(6), 4552-4575.
Marks, K., Bates, P. (2000). Integration of high-resolution topographic data with floodplain flow models. Hydrological Processes, 14(11-12), 2109-2122.
Park, H., Cox, D. T., Lynett, P. J., Wiebe, D. M., Shin, S. (2013). Tsunami inundation modeling in constructed environments: A physical and numerical comparison of free-surface elevation, velocity, and momentum flux. Coastal Engineering, 79, 9-21.
Prasetyo, A. (2017), Physical Modeling ad Numerical Analysis of Tsunami Inundation in a City Scale, Ph.D Thesis, Kyoto University.
Simamora C., Shigihara Y., Fujima K. (2007), Experimental Study on Tsunami Forces Acting on Struc- tures, Annual Journal of Coastal Engineering, 54, 831-835 (in Japanese).
Wieselsberger, C. (1921). Neuere Feststellungen uber die Gesetze des Flussingkeits - und Luftwiderstands, Phys. Z. 22, pp. 321- 328.