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Modeling of nutrient dynamics in the nepheloid layer with resuspension of bottom sediment in the Ariake Bay

Research Project

Project/Area Number 25450258
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Aquatic bioproduction science
Research InstitutionSaga University

Principal Investigator

Koriyama Masumi  佐賀大学, 全学教育機構, 准教授 (30380794)

Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2015: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Keywords有明海 / 底泥 / 巻き上げ / 懸濁層 / 栄養塩 / 吸着態リン / 吸着態NH4 / 吸脱着
Outline of Final Research Achievements

In this study, the nutrient dynamics, such as adsorption and desorption characteristics of nutrients to the bottom mud particles, in the nepheloid layer with resuspension of bottom sediment were investigated based on the field measurements in the inner area of the Ariake Bay and the laboratory experiments. As a result, the spatial and temporal variations in water quality and nutrient concentrations at neap tide were clarified in the field sea area. We found that the NH4+ and PO43- concentrations in the nepheloid layer near river mouth were thought to be influenced by the supply of NH4+and PO43- due to the violent resuspension of bottom sediment (turbidity) and the advection from rivers (salinity) based on the multi regression analysis. From the laboratory experiments, we found that the variations of NH4+ and PO43- concentrations in the aqueous suspension were caused by desorption of NH4+ and PO43- adsorbed on resuspended sediment particles, which strongly depend on SS concentration.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (7 results)

All 2016 2015 2014 2013

All Journal Article (3 results) (of which Peer Reviewed: 1 results) Presentation (4 results)

  • [Journal Article] 有明海奥部底泥の巻き上げに伴う懸濁層における栄養塩濃度の変動特性2016

    • Author(s)
      郡山益実、西山修司, 石谷哲寛
    • Journal Title

      佐賀大学農学部彙報

      Volume: 101 Pages: 25-32

    • NAID

      110010040629

    • Related Report
      2015 Annual Research Report
  • [Journal Article] 有明海奥部における底泥の巻き上げ特性に関する現地観測2015

    • Author(s)
      西山修司, 郡山益実, 石谷哲寛
    • Journal Title

      佐賀大学農学部彙報

      Volume: 100 Pages: 55-62

    • NAID

      110009921593

    • Related Report
      2014 Research-status Report
  • [Journal Article] 有明海奥部底質における吸着態NH4+の季節変化とその影響因子2013

    • Author(s)
      郡山益実・荒木啓輔・伊藤祐二・片野俊也・石谷哲寛
    • Journal Title

      土木学会論文集B2(海岸工学)

      Volume: B2-69 Pages: 1141-1145

    • NAID

      130004550975

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Presentation] 有明海奥部河口浅海域における底泥の巻き上げ特性と水質環境2014

    • Author(s)
      西山修司・郡山益実・石谷哲寛
    • Organizer
      農業農村工学会
    • Place of Presentation
      佐賀市 ホテルグランデはがくれ
    • Year and Date
      2014-10-29
    • Related Report
      2014 Research-status Report
  • [Presentation] 有明海奥部西岸域における底泥の巻き上げ特性2014

    • Author(s)
      西山修司・郡山益実・石谷哲寛
    • Organizer
      農業農村工学会
    • Place of Presentation
      新潟 朱鷺メッセ新潟コンベンションセンター
    • Year and Date
      2014-08-26 – 2014-08-28
    • Related Report
      2014 Research-status Report
  • [Presentation] 有明海奥部底質における吸着態NH4+の変動特性2013

    • Author(s)
      郡山益実・石谷哲寛・西山修司・荒木啓輔
    • Organizer
      農業農村工学会九州支部
    • Place of Presentation
      宮崎市(宮崎観光ホテル)
    • Related Report
      2013 Research-status Report
  • [Presentation] 有明海奥部底質における吸着態NH4+の季節変化とその影響因子2013

    • Author(s)
      郡山益実・荒木啓輔・伊藤祐二・片野俊也・石谷哲寛
    • Organizer
      第60回海岸工学講演会
    • Place of Presentation
      福岡市(九州大学)
    • Related Report
      2013 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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