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Scientific examination of the effectiveness of wood piles as a countermeasure for coastal protection and disaster mitigation

Research Project

Project/Area Number 19K04964
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 InstitutionTokyo Institute of Technology

Principal Investigator

Takagi Hiroshi  東京工業大学, 環境・社会理工学院, 教授 (40619847)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Keywords木杭消波工 / グリーンインフラ / 沿岸域防災 / 適正技術 / 防波堤 / 波浪軽減 / 簡易消波工 / 沿岸防災 / 木杭 / 漂砂 / 海岸保全 / 波力軽減 / 消波効果 / ローカル材料 / 海岸浸食 / 流体 / 水理実験 / ダムブレイク実験 / 護岸 / 木杭消波 / 簡易海岸保全 / 沿岸域 / 防災 / SDGs / 海岸侵食 / 開発途上国
Outline of Research at the Start

本研究では開発途上国の海岸で経験的に使われている木杭を科学的・工学的な対象として取り上げる。木杭による対策は,砂浜を固定化しないため,自然な漂砂運動を阻害せず,海岸の動的均衡状態が維持されると期待する。水質面での環境負荷や生態系への影響も小さいと考えられ,またローカル材料を活用すれば,地域の産業育成にも貢献できる。安価に設置でき,施工も容易なため,効果が検証されるとともに,より合理的・効果的な設置方法が確立されれば,科学・工学と途上国の経験が融合した画期的な海岸保全工法につながる可能性がある。本研究を端緒とし,「環境調和型次世代木杭消波工」を創出し,その合理的な設計手法を提案したい。

Outline of Final Research Achievements

This study focused on wooden piles which are often used as a simple coastal protection measure in developing countries, and conducted various experiments to verify their effectiveness. The finding of past surveys conducted in Phan Thiet, Vietnam, was helpful to conduct detailed numerical analysis and dam-break experiments reproducing the local wooden piles. The research results were published in several international journals. For example, the results on the wave run-up mitigation and coastal erosion reduction effects of wooden piles were published in the Journal of Coastal Conservation, the dam-break experiments were conducted and a detailed analysis of the factors causing the statistical variation of the wave pressure was published in the Journal of Marine Science and Engineering, and the journal of Nature-based Solution on the effects of wave action and tide level during a recent typhoon in very shallow water areas where wooden piles are often used.

Academic Significance and Societal Importance of the Research Achievements

木杭による対策は砂浜を固定化しないため,自然な漂砂運動を阻害せず,水質面での環境負荷や生態系への影響も小さいと考えられる。またローカル材料を活用すれば,地域の産業育成にも貢献できる。コンクリート護岸よりも安価に設置でき,施工も容易なため,効果が検証されるとともに,より合理的・効果的な設置方法が確立されれば,科学・工学と途上国の経験が融合した海岸保全工法につながると期待できる。本研究の成果を端緒とし,今後さらに効率的・効果的な環境調和型次世代木杭消波工を目指し研究を続け,その合理的な設計手法についても提案していきたい。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (13 results)

All 2023 2022 2021 2020 2019 Other

All Int'l Joint Research (2 results) Journal Article (11 results) (of which Int'l Joint Research: 7 results,  Peer Reviewed: 11 results,  Open Access: 7 results)

  • [Int'l Joint Research] ホーチミン市工科大学(ベトナム)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] ブラパー大学(タイ)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Survival of young planted mangroves in a calm bay environment during a tropical cyclone2023

    • Author(s)
      Takagi Hiroshi
    • Journal Title

      Nature-Based Solutions

      Volume: 4 Pages: 100082-100082

    • DOI

      10.1016/j.nbsj.2023.100082

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Coastal disasters in Asia: Forecasting, Uncovering, Recovering, and Mitigation2023

    • Author(s)
      Takagi Hiroshi、Heidarzadeh Mohammad
    • Journal Title

      Coastal Engineering Journal

      Volume: 65 Issue: 1 Pages: 1-2

    • DOI

      10.1080/21664250.2023.2178122

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] An experimental study on oscillatory characteristics of young mangroves behind a portable reef2022

    • Author(s)
      Sreeranga Sindhu、Takagi Hiroshi、Kubota Shin-Ichi、Mitsui Jun
    • Journal Title

      Coastal Engineering Journal

      Volume: 65 Issue: 1 Pages: 110-125

    • DOI

      10.1080/21664250.2022.2161124

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Oscillatory characteristics of young mangroves exposed to short-period waves2021

    • Author(s)
      Takagi Hiroshi、Shirai Rikuo、Sreeranga Sindhu
    • Journal Title

      Science of The Total Environment

      Volume: 790 Pages: 148157-148157

    • DOI

      10.1016/j.scitotenv.2021.148157

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Short-fetch high waves during the passage of 2019 Typhoon Faxai over Tokyo Bay2021

    • Author(s)
      Takagi Hiroshi、Takahashi Atsuhei
    • Journal Title

      Frontiers of Earth Science

      Volume: 16 Issue: 1 Pages: 206-219

    • DOI

      10.1007/s11707-021-0872-2

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] People's perception of land subsidence, floods, and their connection: A note based on recent surveys in a sinking coastal community in Jakarta2021

    • Author(s)
      Takagi Hiroshi、Esteban Miguel、Mikami Takahito、Pratama Munawir Bintang、Valenzuela Ven Paolo Bruno、Avelino John Erick
    • Journal Title

      Ocean & Coastal Management

      Volume: 211 Pages: 105753-105753

    • DOI

      10.1016/j.ocecoaman.2021.105753

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A new tropical cyclone surge index incorporating the effects of coastal geometry, bathymetry and storm information2021

    • Author(s)
      Islam Md. Rezuanul、Lee Chia-Ying、Mandli Kyle T.、Takagi Hiroshi
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1

    • DOI

      10.1038/s41598-021-95825-7

    • NAID

      120007140328

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Stochastic Uncertainty in a Dam-Break Experiment with Varying Gate Speeds2021

    • Author(s)
      Takagi Hiroshi、Furukawa Fumitaka
    • Journal Title

      Journal of Marine Science and Engineering

      Volume: 9 Issue: 1 Pages: 67-67

    • DOI

      10.3390/jmse9010067

    • NAID

      120006957163

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Community-Based Portable Reefs to Promote Mangrove Vegetation Growth: Bridging between Ecological and Engineering Principles2021

    • Author(s)
      Sreeranga Sindhu、Takagi Hiroshi、Shirai Rikuo
    • Journal Title

      International Journal of Environmental Research and Public Health

      Volume: 18 Issue: 2 Pages: 590-590

    • DOI

      10.3390/ijerph18020590

    • NAID

      120006957164

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Do wooden pile breakwaters work for community-based coastal protection?2020

    • Author(s)
      Takagi Hiroshi、Sekiguchi Shoya、Thao Nguyen Danh、Rasmeemasmuang Thamnoon
    • Journal Title

      Journal of Coastal Conservation

      Volume: 24 Issue: 3

    • DOI

      10.1007/s11852-020-00749-5

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] “Adapted mangrove on hybrid platform” ? Coupling of ecological and engineering principles against coastal hazards2019

    • Author(s)
      Takagi Hiroshi
    • Journal Title

      Results in Engineering

      Volume: 4 Pages: 100067-100067

    • DOI

      10.1016/j.rineng.2019.100067

    • NAID

      120006782684

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access

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Published: 2019-04-18   Modified: 2025-01-30  

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