A numerical model for far-field tsunamis and its application to predict damages done to aquaculture |
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Authors: | Osami Nagano Fumihiko Imamura Nobuo Shuto |
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Affiliation: | (1) Electric Power Development Co. Ltd., 253 Chigasaki, Kanagawa, Japan;(2) Department of Civil Engineering, Tohoku University, 980 Aoba, Densai, Japan |
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Abstract: | The 1960 Chilean tsunami which traveled the Pacific Ocean and caused much damages to Japan is simulated from its generation to the terminal effects on coastal areas. In the computation of ocean propagation by the linear longwave theory, a new technique is introduced to keep the same accuracy as the linear Boussinesq equation and reduce the CPU time as well as the computer memory. In the coastal transformation computation, the energy dissipation due to sea-bottom scouring is suggested to be included, particularly in the case of long bays. To obtain accurate results, the current velocity requires finer spatial grids than the water surface elevation. Damage done to pearl culture rafts are explained in terms of the computed current velocity. |
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Keywords: | The 1960 Chilean tsunami numerical simulation Imamura number difference between farand near-field tsunamis sea-bottom scouring damage to aquaculture |
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