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Study on the material cycle and environmental restoration in the inner area of Ariake Sea

Research Project

Project/Area Number 18H03360
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 63010:Environmental dynamic analysis-related
Research InstitutionSaga University

Principal Investigator

Hayami Yuichi  佐賀大学, 農学部, 准教授 (00335887)

Co-Investigator(Kenkyū-buntansha) 高巣 裕之  長崎大学, 水産・環境科学総合研究科(環境), 助教 (00774803)
藤井 直紀  佐賀大学, 農学部, 特任助教 (10403859)
小森田 智大  熊本県立大学, 環境共生学部, 准教授 (10554470)
山口 創一  九州大学, 総合理工学研究院, 助教 (20457493)
田井 明  九州大学, 工学研究院, 准教授 (20585921)
梅澤 有  東京農工大学, (連合)農学研究科(研究院), 准教授 (50442538)
和田 実  長崎大学, 水産・環境科学総合研究科(水産), 教授 (70292860)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2020: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2019: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2018: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Keywords有明海 / 潮流 / 貧酸素 / 数値モデル / 溶存有機炭素 / 潮汐 / 海洋環境 / 物質循環 / 環境再生 / レジームシフト / 富栄養化
Outline of Final Research Achievements

Inter annual variation of tidal currents were strongly affected by the 18.6 year lunar nodal cycle. As the tidal currents increased, the bottom water DO was decreased. The results of the fortnight survey indicated that the respiration of the phytoplankton had a large influence of the bottom water oxygen demand. It was found that the decomposition of terrestrial dissolved organic matter had a large contribution for the regeneration of nutrients. The effect of a method to create and control a tidal residual current by using artificial bottom roughness on bottom water DO was examined. The bottom water DO increased 0.14mg/L by this method. The effect of the increase of arc shell was examined with an ecosystem model. When the arc shell increased 50 ind/m2, phytoplankton density decreased 20% and bottom water DO increased 5%.

Academic Significance and Societal Importance of the Research Achievements

有明海では、長期的に陸域負荷の増加はなく、広大な干潟が存在するにもかかわらず、赤潮の増加・貧酸素水塊の発生といった内湾の富栄養化に典型的な症状が生じ、二枚貝や底魚の減少が問題になっている。この問題の発生要因を明らかにするために、中長期連続モニタリングとそのデータ解析、有明海奥部における物質循環調査、数値モデルを組み合わせて研究を行った。諫早湾の貧酸素の長期変動は長期的な月の運動の変化が大きく影響していた。酸素消費や、栄養塩の再生について新たな発見がもたらされた。環境再生策として、平均的な流れを変化させるようなブロックの効果を調べた。また、二枚貝を増加させた場合の環境再生効果についても検討した。

Report

(4 results)
  • 2021 Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (16 results)

All 2022 2021 2020 2019

All Journal Article (8 results) (of which Peer Reviewed: 8 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results) Book (1 results)

  • [Journal Article] Environmental Problems in the Ariake Sea – Long-Term Environmental Changes2021

    • Author(s)
      速水祐一
    • Journal Title

      Bulletin on Coastal Oceanography

      Volume: 59 Issue: 1 Pages: 33-45

    • DOI

      10.32142/engankaiyo.2021.8.001

    • NAID

      130008085469

    • ISSN
      1342-2758, 2434-4036
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] MECHANISM OF THE SPATIO-TEMPORAL DIFFERENCES IN THE M<sub>2</sub> TIDAL AMPLIFICATION FACTOR DUE TO THE DECREASE OF THE BAY LENGTH IN THE ARIAKE SEA2021

    • Author(s)
      田井明
    • Journal Title

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

      Volume: 77 Issue: 2 Pages: I_361-I_366

    • DOI

      10.2208/kaigan.77.2_I_361

    • NAID

      130008113337

    • ISSN
      1883-8944, 1884-2399
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Nutrient regeneration from riverine high-molecular-weight dissolved organic matter through marine bacterial decomposition in a eutrophic coastal system: the Ariake Sea, Japan2021

    • Author(s)
      Takasu H, Koji Uchino
    • Journal Title

      Journal of Sea Research

      Volume: 177 Pages: 102-114

    • DOI

      10.1016/j.seares.2021.102114

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Influence of River Inflow and Microbial Activity on Distribution of Dissolved Organic Carbon in the Northern Part of Ariake Sea, Kyushu, Japan2021

    • Author(s)
      Uchino K, Mori K, Fukushima N, Takasu H
    • Journal Title

      Journal of Water and Environment Technology

      Volume: 19 Issue: 3 Pages: 153-160

    • DOI

      10.2965/jwet.20-174

    • NAID

      130008050842

    • ISSN
      1348-2165
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Evaluation of origin-depended nitrogen input through atmospheric deposition and its effect on primary production in coastal areas of western Kyusyu, Japan2021

    • Author(s)
      Umezawa Y, Toyoshima K, Saitoh Y, Takeda S, Tamura K, Tamaya C, Yamaguchi A, Yoshimizu C, Tayasu I, and Kawamoto K
    • Journal Title

      Environment Pollution

      Volume: 291 Pages: 118034-118034

    • DOI

      10.1016/j.envpol.2021.118034

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Dissolved and particulate organic matter dynamics relative to sediment resuspension induced by the tidal cycle in macrotidal estuaries, Kyushu, Japan2020

    • Author(s)
      Takasu H, Uchino K, Mori K
    • Journal Title

      Water

      Volume: 12 Issue: 9 Pages: 2561-2561

    • DOI

      10.3390/w12092561

    • NAID

      120006988509

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Contribution of Organic Matter Decomposition in Water Column to Oxygen Consumption in the Inner Part of the Ariake Sea2019

    • Author(s)
      内野宏治, 猪股はるか, 田原沙紀, 高巣裕之
    • Journal Title

      Journal of Japan Society on Water Environment

      Volume: 42 Issue: 5 Pages: 195-200

    • DOI

      10.2965/jswe.42.195

    • NAID

      130007705272

    • ISSN
      0916-8958, 1881-3690
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Dynamics of bacterial community composition associated with a harmful raphidophyte, Chattonella marina2019

    • Author(s)
      Minoru WADA, Jin WEN, Yuichi HAYAMI and Tatsuya ODA
    • Journal Title

      Proceedings of the 2019 CWMD Conference September 19-21, 2019, Kumamoto University, Japan

      Volume: 1 Pages: 483-488

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] 陸水・沿岸海洋の炭素・窒素の生物地球化学的循環における微生物の役割に関する研究2022

    • Author(s)
      高巣裕之
    • Organizer
      日本陸水学会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 東シナ海周辺海域における潮汐振幅および平均海面水位の関係性2021

    • Author(s)
      大松和暉,田井明
    • Organizer
      令和2年度土木学会西部支部研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 諫早湾の現地観測データに基づく潮流変動特性について2021

    • Author(s)
      許斐聖,田井明,速水祐一
    • Organizer
      令和2年度土木学会西部支部研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Relationship between environment and macrobenthos distribution in the coastal area of Kashima city in Ariake Sea2020

    • Author(s)
      Yuichi Hayami and Naoki Fujii
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Related Report
      2019 Annual Research Report
  • [Presentation] 東シナ海周辺海域における潮汐振幅および平均海面の経年変化2020

    • Author(s)
      大松和暉,田井明
    • Organizer
      令和元年度土木学会西部支部研究発表会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 波浪・潮流カップリング底質輸送シミュレーションによる有明海の再懸濁現象の再現2019

    • Author(s)
      田井明,深野 翔太
    • Organizer
      日本流体力学会年会2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] Dynamics of bacterial community composition associated with a harmful raphidophyte, Chattonella marina2019

    • Author(s)
      Minoru WADA, Jin WEN, Yuichi HAYAMI and Tatsuya ODA
    • Organizer
      2019 CWMD Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Book] 窒素と環境の科学2021

    • Author(s)
      林 健太郎・柴田 英昭・梅澤 有
    • Total Pages
      192
    • Publisher
      朝倉書店
    • ISBN
      9784254180572
    • Related Report
      2020 Annual Research Report

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Published: 2018-04-23   Modified: 2023-01-30  

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