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Basic study on the advancement of the resistance law and wave force evaluation of tsunami inundation flow with sediment

Research Project

Project/Area Number 20K05041
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 25030:Disaster prevention engineering-related
Research InstitutionAkita University

Principal Investigator

MATSUTOMI Hideo  秋田大学, 名誉教授, 名誉教授 (20134083)

Co-Investigator(Kenkyū-buntansha) 有川 太郎  中央大学, 理工学部, 教授 (00344317)
Project Period (FY) 2020-04-01 – 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: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords津波 / 氾濫水密度 / 氾濫流抵抗則 / 波力 / 抵抗則
Outline of Research at the Start

移動床下の土砂を含む津波氾濫流の抵抗則は遡上高ばかりでなく、氾濫水密度、ひいては津波荷重へ影響するが、不明である。遡上高は歴史津波の規模評価へ影響し、津波荷重は波周期の影響も受ける。
以上を背景に、本研究は津波荷重評価や歴史津波の規模評価の高度化を目指し、水理・数値実験や理論解析に基づいて、1)遡上高や氾濫水密度と密接に関係する移動床下の津波氾濫流の実用的な抵抗則の提案、2)その抵抗則と氾濫水密度の関係式の提案と抵抗則の遡上高への影響評価、3)氾濫水密度と津波荷重の関係式の提案、4)波周期と津波荷重の関係式の提案、5)津波氾濫流が土砂を含むと津波荷重が大きくなるかの判定を目的とする。

Outline of Final Research Achievements

Aiming for the advancement of evaluations of tsunami load on structures, historical or prospective tsunami scale, empirical formulas for evaluating friction factor of inundation flow with sediment and density of inundation water under a movable bed, which are available to a tsunami run-up theory, were proposed and influence of the empirical formulas on the run-up height and so on of inundation flow was examined, based on both hydraulic experiments on the density of inundation water together with run-up of inundation flow and theoretical analyses on the run-up of inundation flow. Based on hydraulic experiments, numerical experiments and theoretical analyses, relationship between the density of inundation water and tsunami load together with that between wave period and tsunami load were examined and it was finally judged whether tsunami load was increased or decreased by including sediment in the inundation flow.

Academic Significance and Societal Importance of the Research Achievements

本研究により移動床下の土砂を含む津波氾濫流(非定常流)の実用的な一抵抗則と氾濫水密度評価式が初めて提示された。これらの抵抗則と氾濫水密度評価式を用いた津波氾濫流の水面形を含む遡上理論も提示された。さらに、氾濫水密度や氾濫流の水面形が津波荷重へ影響することを水理実験を通して確認している。これらの研究成果は限られた条件下で得られたもので,今後の研究展開の参考になるとともに一般化が期待され,諸構造物へ作用する津波荷重評価や歴史津波の規模評価の高度化,ひいては津波の防災・減災対策の高度化へ寄与すると考えられる。

Report

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

    (15 results)

All 2023 2022 2021 2020

All Journal Article (6 results) (of which Peer Reviewed: 4 results,  Open Access: 5 results) Presentation (9 results) (of which Int'l Joint Research: 4 results)

  • [Journal Article] 氾濫水密度の時間変化を考慮した津波遡上2022

    • Author(s)
      松冨英夫,有川太郎
    • Journal Title

      土木学会論文集B2(海岸工学)

      Volume: 78 Pages: 247-252

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 平面二次元性を持つ強い段波の伝播と増幅・減衰2021

    • Author(s)
      松冨英夫
    • Journal Title

      土木学会論文集B1(水工学)

      Volume: 77 Pages: 1189-1194

    • NAID

      130008160002

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] 破堤氾濫域における土砂堆積と湛水の状況から概算される氾濫水密度2021

    • Author(s)
      松冨英夫,鎌滝孝信
    • Journal Title

      東北地域災害科学研究

      Volume: 57 Pages: 23-28

    • NAID

      40022503640

    • Related Report
      2020 Research-status Report
    • Open Access
  • [Journal Article] 水平床の貯水部を持つダム破壊流れの斜面遡上2021

    • Author(s)
      松冨英夫
    • Journal Title

      東北地域災害科学研究

      Volume: 57 Pages: 47-52

    • NAID

      40022503651

    • Related Report
      2020 Research-status Report
    • Open Access
  • [Journal Article] 土砂・シルトを含んだ津波の波力に関する実験的研究2020

    • Author(s)
      木瀬晃周,有川太郎
    • Journal Title

      土木学会論文集B2(海岸工学)

      Volume: 76 Pages: 385-390

    • NAID

      130007935795

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 津波遡上への氾濫水密度の影響2020

    • Author(s)
      松冨英夫,有川太郎
    • Journal Title

      土木学会論文集B2(海岸工学)

      Volume: 76 Pages: 391-396

    • NAID

      130007935784

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 津波氾濫流による抗力の評価におけるフルード数と抗力係数2023

    • Author(s)
      松冨英夫
    • Organizer
      東北地域災害科学研究
    • Related Report
      2022 Annual Research Report
  • [Presentation] 移動床斜面における津波氾濫流先端部の水面形と土砂移動に関する一理論2023

    • Author(s)
      松冨英夫
    • Organizer
      第70回海岸工学講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Tsunami run-up considering time variation of density of inundation water2022

    • Author(s)
      Matsutomi Hideo
    • Organizer
      37th International Conference on Coastal Engineering
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Experimental investigation of density effect on tsunami bore forces2022

    • Author(s)
      Arikawa Taro
    • Organizer
      37th International Conference on Coastal Engineering
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 氾濫水密度の時間変化を考慮した津波遡上2022

    • Author(s)
      松冨英夫
    • Organizer
      東北地域災害科学研究
    • Related Report
      2021 Research-status Report
  • [Presentation] 氾濫流抵抗則の津波遡上への適用法2022

    • Author(s)
      松冨英夫
    • Organizer
      東北地域災害科学研究
    • Related Report
      2021 Research-status Report
  • [Presentation] 氾濫流抵抗則実験式の照査2022

    • Author(s)
      松冨英夫
    • Organizer
      土木学会東北支部技術研究発表会
    • Related Report
      2021 Research-status Report
  • [Presentation] Propagation and amplification of a strong bore with two-dimensionality in plane space2021

    • Author(s)
      Matsutomi Hideo
    • Organizer
      30th International Tsunami Symposium
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] EFFECT OF THE DENSITY OF INUNDATION WATER ON TSUNAMI RUN-UP2020

    • Author(s)
      Matsutomi, Hideo
    • Organizer
      International Conference on Coastal Engineering
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research

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Published: 2020-04-28   Modified: 2024-01-30  

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