POTENTIAL IMPACT OF TSUNAMI-INDUCED SEDIMENT TRANSPORT IN KOCHI PREFECTURE CAUSED BY THE NANKAI TROUGH MEGATHRUST EARTHQUAKE
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- YAMASHITA Kei
- 東北大学災害科学国際研究所
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- SUGAWARA Daisuke
- ふじのくに地球環境史ミュージアム
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- SETO Shuji
- 東北大学災害科学国際研究所
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- ARIKAWA Taro
- 中央大学理工学部
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- TAKAHASHI Tomoyuki
- 関西大学社会安全学部
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- IMAMURA Fumihiko
- 東北大学災害科学国際研究所
Bibliographic Information
- Other Title
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- 高知県における最大クラスの津波による地形変化と潜在的影響の評価
- コウチケン ニ オケル サイダイ クラス ノ ツナミ ニ ヨル チケイ ヘンカ ト センザイテキ エイキョウ ノ ヒョウカ
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Abstract
<p> In order to evaluate coastal geomorphic changes and potential impacts of tsunami-induced sediment transport in Kochi Prefecture caused by the Nankai Trough megathrust earthquake, numerical simulations of sediment transport over a wide area of Tosa Bay have been performed. The regional features of potential impact was provided. The tsunami-induced sediment transport can cause not only large-scale erosion and sedimentation around the coastal zone but also increase in tsunami hazards. Note that the influences depend significantly on uncertainties in bed materials, i.e. grain sizes and distributions of erodible/noerodible surfaces. The uncertainties in the simulations will be improved through acquisition of detailed sedimentary data. Further discussions considering the regional characteristics of tsunami-induced sediment transport will provide the resilient countermeasures to tsunami disaster.</p>
Journal
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- Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
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Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 75 (2), I_685-I_690, 2019
Japan Society of Civil Engineers
