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Characteristics of response of coastal morphological system in dynamic equilibrium to the change of sea level and wave direction

Research Project

Project/Area Number 20H02256
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 22040:Hydroengineering-related
Research InstitutionKanazawa University

Principal Investigator

Yuhi Masatoshi  金沢大学, 地球社会基盤学系, 教授 (20262553)

Co-Investigator(Kenkyū-buntansha) 楳田 真也  金沢大学, 地球社会基盤学系, 教授 (30313688)
谷口 健司  金沢大学, 地球社会基盤学系, 教授 (20422321)
二宮 順一  金沢大学, 地球社会基盤学系, 准教授 (20748892)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥12,610,000 (Direct Cost: ¥9,700,000、Indirect Cost: ¥2,910,000)
Fiscal Year 2022: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2021: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2020: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Keywords海浜変形 / 多段砂州 / 漂砂循環系 / 海面上昇 / 波向き変化 / 漂砂循環
Outline of Research at the Start

長期・広域の観測データが蓄積されている石川県加越海岸を対象とし,海浜システムを特徴付ける動的平衡系として,断面2次元的な多段砂州の組織的移動および平面的2次元的な漂砂循環系の形成に着目して,長期海面上昇・波向き変化が及ぼす影響について解析を行う.多段砂州システムに関しては,相対的海面上昇に対する過去の応答履歴特性を解明し,将来的な海面上昇への応答を推定する.波向きの時空間変動を有する漂砂循環系に対しては,冬季高波浪の入射方向変化が及ぼす影響を解明し,将来変化を推定する.さらに,海象の将来変動に対する海浜システム応答が周辺地域に及ぼす影響や対処法について試行検討を行う.

Outline of Final Research Achievements

This study examined the influences of future sea-level rise and changes in wave climate induced by global warming. A series of analyses were conducted for the Kaetsu Coast, Ishikawa, Japan, to investigate the characteristics of the large-scale and long-term response of coastal morphology to the relative sea level rise (coastal erosion) and to estimate the influence of the change in wave direction and sea level on the wave transmission, coastal currents, and sediment transport. A series of results were obtained as shown below; (1) The characteristics of the morphological response of a multiple-bar coast to relative sea level change were clarified; (2) The effects of expected future sea-level changes on wave transmission, longshore currents, and sediment transport were estimated in a littoral cell with variations in dominant transport directions; (3) A model was developed that can efficiently estimate the change in wave run-up due to future sea level rise and the change in wave climate.

Academic Significance and Societal Importance of the Research Achievements

近年,世界各地の海岸において,主に人為的影響により土砂移動のバランスが崩壊した.さらに,地球温暖化に伴う海象変化が長期的に予想されており,順応的海岸管理に資する検討が求められている.本研究の内容は,多段砂州の大規模移動や漂砂方向の反転を伴う複雑な海浜システムにおいて, 将来の海水面上昇や波向き変化に対する応答を推定し,海象変動とそれに伴う地形変化が背後域の波浪災害に及ぼす影響を予測する上で有用な知見,モデルを提示するものである.

Report

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

    (15 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (1 results) Journal Article (6 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 6 results,  Open Access: 3 results) Presentation (8 results)

  • [Int'l Joint Research] オレゴン州立大学/ハワイ大学(米国)

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Sediment Budget and Net Sediment Transport on a Coast Dominated by Waves and Offshore Currents: A Case Study on the Ishikawa Coast and Its Surrounding Areas in Japan2023

    • Author(s)
      T. Thunyaphun, S. Umeda, and M. Yuhi
    • Journal Title

      Journal of Marine Science and Engineering

      Volume: 11 Issue: 3 Pages: 621-621

    • DOI

      10.3390/jmse11030621

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Improvement of empirical formulas to estimate the reduction effects by berms on irregular wave runup over a dune-berm coast2022

    • Author(s)
      M. Yuhi, H. Mase, D.T. Cox, and H. Park
    • Journal Title

      Coastal Engineering

      Volume: 176 Pages: 104166-104166

    • DOI

      10.1016/j.coastaleng.2022.104166

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] SPATIAL DISTRIBUTION OF GRAIN-SIZE OF SURFACE SEDIMENTS AND MORPHOLOGICAL CHANGE IN ISHIKAWA COAST2022

    • Author(s)
      楳田真也,有田守,T.Thunyaphun, D.G.Nhu, 由比政年
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)

      Volume: 78 Issue: 2 Pages: I_583-I_588

    • DOI

      10.2208/kaigan.78.2_I_583

    • ISSN
      1883-8944, 1884-2399
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A FUNDAMENTAL STUDY ON THE CHARACTERISTICS OF MIGRATION AND EVOLUTION OF BAR-TROUGH TYPE MORPHOLOGY2021

    • Author(s)
      YUHI Masatoshi、TOKUNAGA Sayako、UMEDA Shinya
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)

      Volume: 77 Issue: 2 Pages: I_607-I_612

    • DOI

      10.2208/kaigan.77.2_I_607

    • NAID

      130008113314

    • ISSN
      1883-8944, 1884-2399
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] SEASONAL VARIABILITY OF THE CURRENTS IN THE OFFSHORE REGION OF SURF ZONE AND EFFECTS OF EXTERNAL FORCINGS ON THE CURRENTS2021

    • Author(s)
      楳田真也,二宮順一,有田 守,由比政年
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)

      Volume: 77 Issue: 2 Pages: I_355-I_360

    • DOI

      10.2208/kaigan.77.2_I_355

    • NAID

      130008113338

    • ISSN
      1883-8944, 1884-2399
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] NUMERICAL ANALYSIS ON THE INFLUENCE OF SANDBAR CONFIGURATIONS ON THE WAVE TRANSFORMATION AT ISHIKAWA COAST, JAPAN2020

    • Author(s)
      村田祐太,由比政年,楳田真也
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)

      Volume: 76 Issue: 2 Pages: I_649-I_654

    • DOI

      10.2208/kaigan.76.2_I_649

    • NAID

      130007935857

    • ISSN
      1883-8944, 1884-2399
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] 金沢沖に来襲する冬季高波浪と海上風との関連に関す る研究2023

    • Author(s)
      北村 健,由比政年,谷口健司
    • Organizer
      令和4年度土木学会中部支部研究発表会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 波向きの季節変動を伴う海岸における地形変動・漂砂 移動特性に関する基礎的研究2023

    • Author(s)
      井田岳志,由比政年,楳田 真也
    • Organizer
      令和4年度土木学会中部支部研究発表会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Study on Spatial Variation of Grain Size of Seafloor Sediments around Ishikawa Coast2023

    • Author(s)
      Do Quynh Nhu,楳田 真也,有田 守
    • Organizer
      令和4年度土木学会中部支部研究発表会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 石川海岸の長期・中期地形変化と土砂供給源との位置関係に関する基礎的研究2022

    • Author(s)
      由比政年,山崎真志,楳田真也
    • Organizer
      第69回海岸工学講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 石川海岸の中・長期的地形変化が波浪伝達特性に及ぼす影響に関する基礎的研究2022

    • Author(s)
      大屋寛人,由比政年
    • Organizer
      令和3年度土木学会中部支部研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 石川海岸における海底地盤高の長期変動と多段砂州移動の基本特性2022

    • Author(s)
      山崎真志,由比政年
    • Organizer
      令和3年度土木学会中部支部研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 石川海岸の砕波帯沖の流れの発達と外力との関係性2022

    • Author(s)
      帯刀大樹,佐々木健太,楳田真也,二宮順一
    • Organizer
      令和3年度土木学会中部支部研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] FORP長期海洋再解析データを用いた加越沿岸の広域流況の季節変動特性2022

    • Author(s)
      佐々木健太,帯刀大樹,楳田真也,二宮順一
    • Organizer
      令和3年度土木学会中部支部研究発表会
    • Related Report
      2021 Annual Research Report

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

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