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Investigation of the Amplification Mechanism of Tsunamis Generated by Multiple Landslides and Development of their Prediction Method

Research Project

Project/Area Number 19K15104
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 22040:Hydroengineering-related
Research InstitutionKindai University (2021-2022)
Waseda University (2019-2020)

Principal Investigator

TAKABATAKE Tomoyuki  近畿大学, 理工学部, 准教授 (30823380)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords津波 / 地すべり津波 / 地すべり / 非線形性 / 簡易予測式 / 津波避難シミュレーション / 津波避難 / 陸上地すべり津波 / 海底地すべり津波 / 半没水地すべり津波 / 避難シミュレーション / 数値解析 / パル津波 / 平面水槽 / 水理実験 / 避難意識 / 避難 / 防災
Outline of Research at the Start

海底地すべりにより発生する津波は,地震による断層のずれにより生じる津波と比較して発生頻度が少なく,事象自体についてもよくわかっていない点が多い.本研究では,2018年インドネシア・パルで発生した地すべり津波の被害を踏まえ,地すべり津波が複数地点で生じた場合の津波の増幅機構や避難者に対する危険性について検討する.水理実験と数値解析の両面から研究を行い,複数地点で発生する地すべりによる津波増幅メカニズムの解明から,地すべり津波を対象とした有効な津波避難計画など,人的被害の具体的な低減策の提案までを目的とする.

Outline of Final Research Achievements

In the present study, I performed hydrodynamic experiments and numerical simulations targeting multiple landslide-generated tsunamis. As a result, the present study revealed that: (1) landslide-generated tsunamis, being predominantly classified as nonlinear waves, cannot be accurately represented by a simple superposition when overlapping, for the maximum water level; (2) to predict the height of the multiple landslide-generated tsunamis, it is necessary to add a safety margin of several percent to the prediction equations for the maximum water level of a single landslide-generated tsunamis, derived in the present study, or to use a numerical simulation model that can consider both nonlinearity and dispersion effects; (3) as landslide-generated tsunamis could potentially strike immediately after an earthquake occurs, it is necessary to formulate appropriate evacuation plans against landslide-generated tsunamis.

Academic Significance and Societal Importance of the Research Achievements

地すべりによって発生する津波のメカニズムを解明し,その最大高さを予測可能にすることは,社会と人命を守るために非常に重要である.本研究では,地すべり津波を対象として水理実験と数値解析を行い,地すべり津波のメカニズムを分析するとともに,その高さを予測する手法を開発した.また,地すべりが複数発生した場合にも津波高さを予測する手法についても考察し提案した.さらに,地すべり津波から有効に避難を行うためには,通常の地震津波による避難計画に加えて,地すべり津波に対応した避難計画の策定が必要であることを示した.

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (12 results)

All 2022 2021 2020

All Journal Article (7 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 7 results,  Open Access: 2 results) Presentation (5 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] A comparison between agent-based and GIS-based tsunami evacuation simulations: a case study for Tofino, BC2022

    • Author(s)
      Kim Joseph、Takabatake Tomoyuki、Nistor Ioan、Shibayama Tomoya
    • Journal Title

      Canadian Journal of Civil Engineering

      Volume: 49 Issue: 4 Pages: 511-526

    • DOI

      10.1139/cjce-2020-0660

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Influence of road blockage on tsunami evacuation: A comparative study of three different coastal cities in Japan2022

    • Author(s)
      Takabatake Tomoyuki、Chenxi Dawn Han、Esteban Miguel、Shibayama Tomoya
    • Journal Title

      International Journal of Disaster Risk Reduction

      Volume: 68 Pages: 102684-102684

    • DOI

      10.1016/j.ijdrr.2021.102684

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Three‐Dimensional Physical Modeling of Tsunamis Generated by Partially Submerged Landslides2022

    • Author(s)
      Takabatake Tomoyuki、Han Dawn Chenxi、Valdez Justin Joseph、Inagaki Naoto、M?ll Martin、Esteban Miguel、Shibayama Tomoya
    • Journal Title

      Journal of Geophysical Research: Oceans

      Volume: 127 Issue: 1 Pages: 1-17

    • DOI

      10.1029/2021jc017826

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Physical modeling of tsunamis generated by subaerial, partially submerged, and submarine landslides2020

    • Author(s)
      Takabatake Tomoyuki、Mall Martin、Han Dawn Chenxi、Inagaki Naoto、Kisizaki Daichi、Esteban Miguel、Shibayama Tomoya
    • Journal Title

      Coastal Engineering Journal

      Volume: 62 Issue: 4 Pages: 582-601

    • DOI

      10.1080/21664250.2020.1824329

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] The 2018 Sulawesi tsunami in Palu city as a result of several landslides and coseismic tsunamis2020

    • Author(s)
      Aranguiz Rafael、Esteban Miguel、Takagi Hiroshi、Mikami Takahito、Takabatake Tomoyuki、Gomez Matias、Gonzalez Juan、Shibayama Tomoya、Okuwaki Ryo、Yagi Yuji、Shimizu Kousuke、Achiari Hendra、Stolle Jacob、Robertson Ian、Ohira Koichiro、Nakamura Ryota、Nishida Yuta、Krautwald Clemens、Goseberg Nils、Nistor Ioan
    • Journal Title

      Coastal Engineering Journal

      Volume: 62 Issue: 4 Pages: 445-459

    • DOI

      10.1080/21664250.2020.1780719

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Improving the Evacuation Plan of Coastal Communities using Tsunami Evacuation Simulations: Case Study from Tagajyo, Japan2020

    • Author(s)
      Takabatake Tomoyuki,Shibayama Tomoya
    • Journal Title

      International Journal Sustainable Future for Human Security

      Volume: 7 Pages: 25-35

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Tsunami awareness and evacuation behaviour during the 2018 Sulawesi Earthquake tsunami2020

    • Author(s)
      Harnantyari Anisa Shafiyya、Takabatake Tomoyuki、Esteban Miguel、Valenzuela Paolo、Nishida Yuta、Shibayama Tomoya、Achiari Hendra、Rusli、Marzuki Abdul Gafur、Marzuki Muhammad Fadel Hidayat、Aranguiz Rafael、Kyaw Thit Oo
    • Journal Title

      International Journal of Disaster Risk Reduction

      Volume: 43 Pages: 101389-101389

    • DOI

      10.1016/j.ijdrr.2019.101389

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Three-dimensional physical modeling of landslide-generated tsunamis2022

    • Author(s)
      Takabatake, T.; Han, D. C.; Esteban, M.; Shibayama, T.
    • Organizer
      Proceedings of the 38th International Conference on Coastal Engineering (ICCE)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 道路閉塞が津波避難に及ぼす影響の分析―鎌倉市・逗子市・藤沢市を対象として―2022

    • Author(s)
      高畠知行; Dawn Chenxi Han; Miguel Esteban; 柴山知也
    • Organizer
      第69回海岸工学講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 地すべり津波を対象とした平面水槽による水理模型実験2021

    • Author(s)
      高畠知行・Dawn Han Chenxi・Valdez Justin Joseph Panlilio・稲垣直人・澤辺大輔・Zhang Tingyu・木場隆文・Zhao Bingchan・Mall Martin・Miguel Esteban・柴山知也
    • Organizer
      第68回海岸工学講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] Experimental Analysis on Landslide Generated Tsunamis2021

    • Author(s)
      高畠知行・岸崎大知
    • Organizer
      31st International Ocean and Polar Engineering Conference
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 陸上・半没水・海底地すべり津波を対象とした水理模型実験2020

    • Author(s)
      高畠知行
    • Organizer
      第67回海岸工学講演会
    • Related Report
      2020 Research-status Report

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Published: 2019-04-18   Modified: 2024-01-30  

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