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Eutrophication in shallow lakes investigated by an interdisciplinary approach with physical, chemical and biological studies

Research Project

Project/Area Number 19K20432
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 63010:Environmental dynamic analysis-related
Research InstitutionIbaraki University

Principal Investigator

Masunaga Eiji  茨城大学, 地球・地域環境共創機構, 助教 (90779696)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords湖沼 / 貧酸素 / 混合 / 栄養塩 / 霞ヶ浦 / 乱流混合 / 貧酸素水塊 / 熱収支 / 栄養塩溶出 / 湖 / 富栄養化
Outline of Research at the Start

生態系に重大な悪影響を及ぼす富栄養化は世界各地の湖沼で顕在化しており,持続的な水資源利用等の観点からその解決が急務となっている.しかしながら栄養塩や酸素循環動態の解明に必要な流体力学的な物質輸送過程も浅水湖での知見は乏しい.本研究では富栄養化が進行する茨城県霞ヶ浦における水環境形成メカニズムを解明するために,物理学・化学・生物学の学際的アプローチによる高解像度の実地計測とそれを統合させた最先端の解析モデルを開発する.

Outline of Final Research Achievements

Eutrophication in lakes and reservoirs is pressing issue to improve water quality control and sustainable usage of water in world wide. Phosphoric is a major nutrient in lakes as well as nutrient and is released from lake sediments under hypoxic (low oxygen) conditions. However, nutrient supplies in lakes have not been understood well due to a lack of understanding formation processes of oxygen distributions. This study focused on physical processes associated with eutrophication and investigated water environments in Lake Kasumigaura, Japan, by an interdisciplinary approach with physical, chemical and biological studies.

Academic Significance and Societal Importance of the Research Achievements

本研究では,これまで解析が進んでいなかった小スケールの乱流や波動現象を直接観測し,これらの計測技術と化学・生態系プロセスに精通する研究協力者と連携して栄養塩の動態を解明する点に学術的意義がある.世界の多くの湖沼やため池における富栄養化や水質汚濁は大きな問題となっており,解決策を立てるためにこれらの現象に関わる物理・生態構造の把握が急務となっている.本研究から明らかにした霞ヶ浦における貧酸素水動態や関連する現象は,本研究をケーススタディとして富栄養化が進む世界各国の湖沼での富栄養化対策モデルを提供し,世界規模で問題となっている浅水域の環境改善に貢献できる.

Report

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

    (58 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (4 results) Journal Article (16 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 16 results) Presentation (38 results) (of which Int'l Joint Research: 13 results)

  • [Int'l Joint Research] Colorado State University/Scripps Institute of Oceanography(米国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Colorado State University/Stanford University(米国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] University of Strathclyde(英国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Colorado State University/Stanford University/Lawrence Livermore National Laboratory(米国)

    • Related Report
      2019 Research-status Report
  • [Journal Article] 自動昇降装置を用いた夏季における北浦の貧酸素水塊の形成・消失およびリン溶出状況の検討2022

    • Author(s)
      北村立実,鮎川和泰,増永英治,小室俊輔,大内孝雄,湯澤美由紀,浅岡大輝,三上育英,清家泰,福島武彦
    • Journal Title

      水環境学会誌

      Volume: 45

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Variability of the diapycnal mixing coefficient in coastal oceans investigated with direct microstructure measurements2022

    • Author(s)
      Masunaga Eiji、Venayagamoorthy S. Karan、Wada Koyo、Yamazaki Hidekatsu
    • Journal Title

      Journal of Marine Systems

      Volume: 230 Pages: 103722-103722

    • DOI

      10.1016/j.jmarsys.2022.103722

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 領域海洋モデルを用いた黒潮・親潮混合水域における水塊分布に関する研究2021

    • Author(s)
      池田雅・増永英治・鈴江洋太・伊藤幸彦・内山雄介
    • Journal Title

      土木学会論文集(B2海岸工学)

      Volume: 77

    • NAID

      130008113322

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 粒子追跡モデルを用いた相模湾及び駿河湾周辺の物質輸送過程の解析2021

    • Author(s)
      井上孝義・増永英治・小硲大地・Xu Xhang・内山雄介
    • Journal Title

      土木学会論文集(B2海岸工学)

      Volume: 77

    • NAID

      130008113321

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 東京湾湾奥部における貧酸素水塊に関わる物理構造と混合状態2021

    • Author(s)
      到津春樹・増永英治
    • Journal Title

      土木学会論文集(B2海岸工学)

      Volume: 77

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 北浦における貧酸素水塊の詳細分布と貧酸素水域面積の推計2021

    • Author(s)
      小室俊輔,北村立実,大内孝雄,増永英治,浅岡大輝,鮎川和泰,三上育英,清家泰,湯澤美由紀,福島武彦
    • Journal Title

      水環境学会誌

      Volume: 44 Pages: 157-164

    • NAID

      130008087548

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Baroclinic Residual Circulation and Mass Transport Due to Internal Tides2020

    • Author(s)
      Masunaga Eiji、Arthur Robert S.、Yamazaki Hidekatsu
    • Journal Title

      Journal of Geophysical Research: Oceans

      Volume: 125 Issue: 4

    • DOI

      10.1029/2019jc015316

    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Diel vertical migration promotes zooplankton horizontal patchiness2020

    • Author(s)
      Chen Bingzhang、Masunaga Eiji、Smith Sherwood Lan、Yamazaki Hidekatsu
    • Journal Title

      Journal of Oceanography

      Volume: 77 Issue: 1 Pages: 123-135

    • DOI

      10.1007/s10872-020-00564-4

    • NAID

      40022471999

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 地形と成層の変化に関連する風応力による混合応答時間の評価2020

    • Author(s)
      浅岡 大輝, 増永 英治, 小室 俊輔 , 北村 立実
    • Journal Title

      土木学会論文集(B2海岸工学)

      Volume: 76

    • NAID

      130007935825

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] 粒子追跡モデルを用いた黒潮から沿岸域への物質輸送過程の評価2020

    • Author(s)
      増永 英治, 木村 和久, 小硲 大地, 張 旭, 内山 雄介
    • Journal Title

      土木学会論文集(B2海岸工学)

      Volume: 76

    • NAID

      130007935902

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Stratification and mixing processes associated with hypoxia in a shallow lake (Lake Kasumigaura, Japan)2020

    • Author(s)
      Eiji Masunaga, Shunsuke Komuro
    • Journal Title

      Limnology

      Volume: 21 Issue: 2 Pages: 173-186

    • DOI

      10.1007/s10201-019-00600-3

    • NAID

      40022207865

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] 沿岸地形と風応力が形成する複雑な密度構造と混合状態の高精度計測2019

    • Author(s)
      増永英治,浅岡 大輝,小室 俊輔,松本 俊一,小野 正人,番場 泰彰
    • Journal Title

      土木学会論文集B2(海岸工学)

      Volume: 75

    • NAID

      130007730172

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Observation of three dimensional flow structures and effluent transport around fish cages using a towed ADCCP and free-fall multi-parameter profiler2019

    • Author(s)
      Hidekatsu Yamazaki, Wataru Aoyama, Eiji Masunaga, Mamoru Tanaka
    • Journal Title

      Aquaculture

      Volume: 50 Issue: 4 Pages: 1107-1116

    • DOI

      10.1111/are.13985

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Internal Wave Breaking Dynamics and Associated Mixing in the Coastal Ocean2019

    • Author(s)
      Eiji Masunaga, Robert S. Arthur, Oliver B. Fringer
    • Journal Title

      Encyclopedia of Ocean Science

      Volume: 3 Pages: 548-554

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Lagrange粒子追跡モデルを用いた伊豆諸島周辺海域の物質輸送及び拡散の評価2019

    • Author(s)
      木村和久,増永英治,小硲大地,内山雄介
    • Journal Title

      土木学会論文集B2(海岸工学)

      Volume: 75

    • NAID

      130007730168

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Strong Internal Waves Generated by the Interaction of the Kuroshio and Tides over a Shallow Ridge2019

    • Author(s)
      Eiji Masunaga, Yusuke Uchiyama, Hidekatsu Yamazaki
    • Journal Title

      Journal of Physical Oceanography

      Volume: 49 Issue: 11 Pages: 2917-2934

    • DOI

      10.1175/jpo-d-18-0238.1

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 北浦における現場観測データを用いた底泥からのPO4-P溶出量算出の試み2022

    • Author(s)
      北村立実,大内孝雄,木村夏紀,古川真莉子,湯澤美由紀,福島武彦,増永英治,島根大学 鮎川和泰,清家泰
    • Organizer
      第56回日本水環境学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 夏季の北浦における水温成層及び貧酸素水塊の形成と消失条件の検討2022

    • Author(s)
      北村立実,増永英治,鮎川和泰
    • Organizer
      霞ヶ浦流域研究2022
    • Related Report
      2021 Annual Research Report
  • [Presentation] 夏期の霞ヶ浦の西浦と北浦の混合状態の比較2022

    • Author(s)
      佐藤和貴,増永英治,北村立実
    • Organizer
      霞ヶ浦流域研究2022
    • Related Report
      2021 Annual Research Report
  • [Presentation] 霞ヶ浦における水質の長期変動と気候変動の関連性の評価2022

    • Author(s)
      松本大樹,増永英治,佐藤和貴
    • Organizer
      霞ヶ浦流域研究2022
    • Related Report
      2021 Annual Research Report
  • [Presentation] Vertical mixing and mass transport in a shallow lake, Lake Kasumigaura, Japan2021

    • Author(s)
      Eiji Masunaga, Tatsumi Kitamura, Sachihiko Itoh
    • Organizer
      JpGU Meeting 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Physical structure and mixing processes in the inner part of Tokyo Bay2021

    • Author(s)
      Haruki Itozu, Eiji Masunaga
    • Organizer
      JpGU Meeting 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Material transport and diffusion around Sagami Bay and Suruga Bay using a particle tracking model2021

    • Author(s)
      Takayoshi Inoue, Eiji Masunaga1 Taichi Kosako, Yusuke Uchiyama
    • Organizer
      JpGU Meeting 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Water mass classification off the east coast of Japan mainland using Regional Ocean Modeling System (ROMS)2021

    • Author(s)
      Masashi Ikeda, Eiji Masunaga, Yusuke Uchiyama, Yota Suzue, Sachihiko Itoh
    • Organizer
      JpGU Meeting 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Submeso-scale Eddies Generated in the Vicinity of the Izu-Ogasawara Ridge Investigated with aRegional Oceanic Simulator2021

    • Author(s)
      Eiji MASUNAGA, Xu ZHANG, Yusuke UCHIYAMA
    • Organizer
      AOGS Meeting 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 北浦における底泥からのリン溶出速度の特徴2021

    • Author(s)
      北村立実,大内孝雄,木村夏紀,古川真莉子,湯澤美由紀,福島武彦,増永英治,鮎川和泰,清家泰,
    • Organizer
      第85回 日本陸水学会東京大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 黒潮と潮汐が影響する伊豆小笠原海嶺北部における サブメソスケール渦と物質輸送2021

    • Author(s)
      増永英治,内山雄介,Xu Zhang,木村和久,小硲大地
    • Organizer
      2021年度日本海洋学会秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 領域海洋モデルと粒子追跡モデルを用いた黒潮・親潮混合水域における水界分析に関する研究2021

    • Author(s)
      池田雅,増永英治,鈴江洋太,伊藤幸彦,内山雄介
    • Organizer
      2021年度日本海洋学会秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 領域海洋モデルを用いた黒潮・親潮混合水域における水塊分布に関する研究2021

    • Author(s)
      池田雅・増永英治・鈴江洋太・伊藤幸彦・内山雄介
    • Organizer
      第68回海岸工学講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 粒子追跡モデルを用いた相模湾及び駿河湾周辺の物質輸送過程の解析2021

    • Author(s)
      井上孝義・増永英治・小硲大地・Xu Xhang・内山雄介
    • Organizer
      第68回海岸工学講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 東京湾湾奥部における貧酸素水塊に関わる物理構造と混合状態2021

    • Author(s)
      到津春樹・増永英治
    • Organizer
      第68回海岸工学講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 霞ヶ浦における貧酸素水塊の分布と酸素消費速度について2021

    • Author(s)
      北村立実,大内孝雄,湯澤美由紀,福島武彦,佐藤礼二,浅岡大輝,増永英治, 鮎川和泰,清家泰
    • Organizer
      第55回日本水環境学会年会
    • Related Report
      2020 Research-status Report
  • [Presentation] 黒潮が影響する伊豆小笠原海嶺北部における 内部波と渦2020

    • Author(s)
      増永 英治,内山雄介,張旭
    • Organizer
      2020年度日本海洋学会秋季大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 地形と成層の変化に関連する 風応力による混合応答時間の評価2020

    • Author(s)
      浅岡大輝,増永英治,小室俊輔,北村立実
    • Organizer
      海岸工学講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] 粒子追跡モデルを用いた 黒潮から沿岸域への物質輸送過程の評価2020

    • Author(s)
      増永 英治,木村 和久,小硲 大地,張 旭,内山 雄介
    • Organizer
      海岸工学講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] Effects of the wind forcing on a shallow lake associated with the lake size and stratification2020

    • Author(s)
      Daiki Asaoka, Eiji Masunaga, Shunsuke Komuro, Tatsumi Kitamura
    • Organizer
      JpGU-AGU Joint meeting 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Seasonal oceanic variability and associated biogeochemical responses around a ridge area along the Kuroshio off Japan2020

    • Author(s)
      Xu Zhang, Yusuke Uchiyama, Yota Suzue, Eiji Masunaga
    • Organizer
      JpGU-AGU Joint meeting 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Observations of vertical mixing and sediment heat flux in a shallow lake2020

    • Author(s)
      Eiji Masunaga, Shunsuke Komuro, Tatsumi Kitamura
    • Organizer
      JpGU-AGU Joint meeting 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Material transport processes around Sagami Bay and Suruga Bay using a particle tracking model2020

    • Author(s)
      Takayoshi Inoue, Eiji Masunaga, Yusuke Uchiyama
    • Organizer
      JpGU-AGU Joint meeting 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Seasonal variation of water masses and turbulence structure off the Sanriku Coast2020

    • Author(s)
      Ikeda Masashi, Eiji Masunaga, Toshi Nagata, Sachihiko Itoh
    • Organizer
      JpGU-AGU Joint meeting 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Enhanced vertical mixing along a shelf-slope front east of Japan2020

    • Author(s)
      Sachihiko Itoh, Eiji Masunaga, TSUTSUMI EISUKE, Takashi T Sakamoto1, Ishikawa Kazuo, Daigo Yanagimoto, Hitoshi Kaneko, Yasuhiro Hoshiba, Daisuke Hasegawa, Toshi Nagata
    • Organizer
      JpGU-AGU Joint meeting 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 三陸沿岸における水平微細構造の季節変動2020

    • Author(s)
      伊藤幸彦, 堤英輔, 増永英治, 坂本天, 柳本大吾, 干場康博, 金子仁, 永田俊, 長谷川大介, 田中潔
    • Organizer
      2020年度日本海洋学会秋季大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 北浦における貧酸素水塊の形成と分布的な特徴2020

    • Author(s)
      北村立実,大内孝雄,湯澤美由紀,福島武彦,佐藤礼二,浅岡大輝,増永英治鮎川和泰,清家泰
    • Organizer
      第23回日本水環境学会シンポジウム
    • Related Report
      2020 Research-status Report
  • [Presentation] Uncertainty of the mixing coefficient investigated with microstructure surveys in coastal oceans2020

    • Author(s)
      E. Masunaga, K. Wada, S. K. Venayagamoorthy, H. Yamazaki
    • Organizer
      Ocean Sciences Meeting 2020
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 北浦の貧酸素化及び栄養塩動態に関する研究①~広域高頻度観測による変動状況の把握~2020

    • Author(s)
      小室俊輔,北村立実,大内孝雄,菊地哲郎,湯澤美由紀,福島武彦,増永英治,三野剛司,番場泰彰
    • Organizer
      水環境学会
    • Related Report
      2019 Research-status Report
  • [Presentation] Mixing and baroclinic structure in a stratified shallow lake, Lake Kasumigaura, Japan2019

    • Author(s)
      Eiji Masunaga, Daiki Asaoka, Shunsuke Komuro, Shunichi Matsumoto, Masahiko Ono, Hiroaki Banba
    • Organizer
      JpGU Meeting 2019
    • Related Report
      2019 Research-status Report
  • [Presentation] Transport processes around the Izu-chain islands investigated with a Lagrangian particle tracking model2019

    • Author(s)
      Waku Kimura, Eiji Masunaga, Taichi Kosako, Yusuke Uchiyama
    • Organizer
      JpGU Meeting 2019
    • Related Report
      2019 Research-status Report
  • [Presentation] Measurement of Physical structure in Kasumigaura using high resolution tow-yo instrument2019

    • Author(s)
      Daiki Asaoka1, Eiji Masunaga, Shunsuke Komuro, Shunichi Matsumoto, Masahiko Ono, Hiroaki Banba
    • Organizer
      JpGU Meeting 2019
    • Related Report
      2019 Research-status Report
  • [Presentation] Mass and heat transport generated by the Kuroshio and tides investigated with a high resolution downscaled regional oceanic model2019

    • Author(s)
      Eiji Masunaga, Waku Kimura, Taichi Kosako, Yusuke Uchiyama
    • Organizer
      AOGS Meeting 2020
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 三陸沿岸海域における多層水塊構造と乱流混合過程2019

    • Author(s)
      増永 英治,伊藤 幸彦,永田俊
    • Organizer
      日本海洋学会2019年度秋季大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Lagrange粒子追跡モデルを用いた黒潮流域における物質輸送及び拡散の評価2019

    • Author(s)
      木村和久,増永英治,小硲大地,内山雄介
    • Organizer
      日本海洋学会2019年度秋季大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 沿岸地形と風応力が形成する複雑な密度構造と混合状態の高精度計測2019

    • Author(s)
      増永英治,浅岡 大輝,小室 俊輔,松本 俊一,小野 正人,番場 泰彰
    • Organizer
      海岸工学講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] Lagrange粒子追跡モデルを用いた伊豆諸島周辺海域の物質輸送及び拡散の評価2019

    • Author(s)
      木村和久,増永英治,小硲大地,内山雄介
    • Organizer
      海岸工学講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] 北浦における貧酸素水塊と水質の変動について2019

    • Author(s)
      小室俊輔,中川圭太,北村立実,松本俊一,福島武彦,増永英治,浅岡大輝,小野正人,番場泰彰
    • Organizer
      水環境学会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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