Chapter
Dec 31, 2015
Breakwater Damage in Okushiri Port Due to the Hokkaido Nansei-Oki Earthquake Tsunami
Publication: Coastal Engineering 1996
Abstract
A tsunami caused by the Hokkaido-Nansei-oki earthquake struck Okushiri Island and the southwest coast of Hokkaido damaging many port facilities. This paper describes typical breakwater damage at Okushiri Port and the applicability of Tanimoto’s formula for tsunami wave forces on vertical walls based on prototype failure analyses and the result of numerical simulations. The armor stability and the rubble mound scourings were examined from the results of 3-D model tests at a scale of 1/15. The damage patterns at the narrow opening of breakwaters were reproduced by the tests. The necessary weight of armor blocks and foot-protection blocks for breakwater heads were calculated by the C.E.R.C. formula using averaged flow speed at the peak of tsunami.
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Information
Published In
Coastal Engineering 1996
Pages: 4676 - 4688
Copyright
© 1997 American Society of Civil Engineers.
History
Published online: Dec 31, 2015
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Authors
Affiliations
Katsutoshi Kimura
Civil Engineering Research Institute, Hokkaido Development Bureau, 1-3 Hiragishi, Sapporo, 062, JAPAN
Yuzo Mizuno
Civil Engineering Research Institute, Hokkaido Development Bureau, 1-3 Hiragishi, Sapporo, 062, JAPAN
Hiroichi Tsuruya
Port and Harbour Research Institute, Ministry of Transport, 3-1-1 Nagase, Yokosuka. 239. JAPAN
Yasuyuki Nakagawa
Port and Harbour Research Institute, Ministry of Transport, 3-1-1 Nagase, Yokosuka. 239. JAPAN
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