2007 Fiscal Year Final Research Report Summary
Quantitative Analysis of Tsunami Disasters by The Jogan Earthquake
| Project/Area Number |
17310103
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Natural disaster science
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| Research Institution | Tohoku University |
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Principal Investigator |
MINOURA Koji Tohoku University, Graduate School of Science, Tohoku University, Professor (10133852)
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| Co-Investigator(Kenkyū-buntansha) |
IMAMURA Fumihiko Graduate School of Engineering, Disaster Control Research Center, Professor (40213243)
IMAIZUMI Toshifumi Graduate School of Science, 大学院・理学研究科, Professor (50117694)
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| Project Period (FY) |
2005 – 2007
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| Keywords | Tsunami / Tsunami deposits / Grain shape / Sediment transport / Grain-size distribution / Facies / Hydraulic experiment / Numerical simulation |
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| Research Abstract |
Mode of sediment transport by the 869 Jogan earthquake tsunami was estimated by analogy with grain-size composition and facies of the tsunami deposit. In addition, initial hydraulic condition of tsunami-induced currents was sedimentologically evaluated to increase knowledge on behavior of tsunami run-ups. Landward fining of the sand layer that comprises the Jogan tsunami deposit was clearly identified on the basis of the grain-size analysis by the laser-diffraction gram-size analyzer. This is consistent with the results from our hydraulic experiments of sediment transport and deposition of tsunamis. It is clarified that mode of fining of sedimentary layer can be treated as important criteria that reflect the energy dissipation of tsunami run-ups. These criteria may provide physical- geographic condition for theoretical understandings of formation of coastal topography. In addition, they may give us indispensable knowledge on developments of urban and industrial infrastructures of coastal areas.
Changes in foraminiferal assemblages after the 2004 Indian Ocean tsunami were clearly demonstrated by the micropaleontological analysis of sediment samples collected from the southwest coast of Thailand. This implies that traces of turbidity currents induced by tsunami backwashes can be preserved in submarine sedimentary environments. Therefore history of tsunami occurrence is possible to uncover based on sediment excavation on the ocean. These results were presented and gained scientific attention in the XXIV General Assembly of IUGG that was held in Perugia, Italy, in July 2007, as an actual example of tsunami disaster and sedimentation.
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[Journal Article] Distribution, origin and transport process of boulders deposited by the 2004 Indian Ocean tsunami at Pakarang Cape, Thailand2007
Author(s)
Goto, K. Chavanich, S. A., Imamura, F., Kunthasap, P., Matsui, T., Minoura, K., Suygawara, D., yanagisawa, H.
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Journal Title
Sedimentary Geology 202
Pages: 821-837
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Tsunami Assessment for Risk management at Nuclear Power Facilities in Japan2007
Author(s)
Yanagisawa, K., Imamura, F., Sakamiyama, T., annaka, T., Takeda T., Shuto, N.
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Journal Title
Pure and Applied Geophysics 164
Pages: 565-576
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Investigation of tsunamiinduced damage and fragility of buildings in Thailand after the December 2004 Indian ocean tsunami2006
Author(s)
Anata, R., Yanagisawa, H., Foytong, P., Panitan, L., Koshimura, S., Imamura, F.
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Journal Title
Earthquake Spectra 22
Pages: S377-S401
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] A Huge Sand Some Formed by the 1854 Earthquake Tsunami in Suruga Bay, Central Japan2005
Author(s)
Sugawara, D., Minoura, K., Imamura, F., Takahashi, T., Shuto, N.
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Journal Title
ISET Journal of Earthquake Technology 42
Pages: 147-158
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] A tsunami generated by a possible submarine slide: Evidence for slope failure triggered by the North Anatolian Fault movement2005
Author(s)
Minoura, K., Imamura, F., Kuran, U., nakamura, T., Papadopoulos, G. A., Takahashi, T., Yalciner, A. C.
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Journal Title
Natural Hazards 36
Pages: 297-306
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Micropaleontological analysis of 2004 Indian Ocean Tsunami sediments recovered from the offshore of Pakarang, Thailand2007
Author(s)
Minoura, K., Sugawara, D., Nemoto, N., Tsukawaki, S., Shinozaki, T., Goto, K., Imamura, F.
Organizer
International Union of Geodesy and Geophysics (IUGG) XXIV General Assembly
Place of Presentation
Perugia, Italy
Year and Date
2007-07-10
Description
「研究成果報告書概要(欧文)」より
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