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Visualization of present state and countermeasure effects of local groundwater pollution(Fostering Joint International Research)

Research Project

Project/Area Number 16KK0014
Research Category

Fund for the Promotion of Joint International Research (Fostering Joint International Research)

Allocation TypeMulti-year Fund
Research Field Geotechnical engineering
Research InstitutionNagasaki University

Principal Investigator

NAKAGAWA Kei  長崎大学, 水産・環境科学総合研究科(環境), 教授 (90315135)

Project Period (FY) 2017 – 2019
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥13,130,000 (Direct Cost: ¥10,100,000、Indirect Cost: ¥3,030,000)
Keywords硝酸性窒素 / 地下水汚染 / 数値シミュレーション
Outline of Final Research Achievements

Nitrate pollution in groundwater is a serious environmental problem in the Shimabara Peninsula, Nagasaki Prefecture, Japan. For efficient countermeasures and remediation of the groundwater, numerical simulation may constitute a powerful tool. Along this line, we developed a numerical model to improve the understanding of transport processes in the nitrate pollution and we evaluated the effects of remediation countermeasures by using the FREEWAT software including MODFLOW as numerical engine. The steady state results of groundwater flow simulations reproduced observed hydraulic head data. According to the numerical transport simulation results (performed using MT3DMS), the general trend of concentration changes well agreed with observation during the past 44 years. Remediation simulations indicate that it will take about 18 years for groundwater concentrations to fall below Japanese drinking water standards. The pre-requisite is a 40% reduction in nitrate load of the source zone.

Academic Significance and Societal Importance of the Research Achievements

本研究成果は,環境省の「地下水保全のための硝酸性窒素等地域総合対策検討会」および長崎県の「島原半島窒素負荷低減対策会議」において公表していくことを考えており,対策効果の見える化を行い,実質的な地域における水環境改善に役立てることができる点に意義があると考える.また本国際共同研究の活動を通じ,ルンド大学のポスドクや博士課程学生らと協働で,国際的な地下水汚染問題に関するプロジェクトに取り組むことなど,国際的な研究ネットワークの構築も進めることができた.

Report

(2 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • Research Products

    (10 results)

All 2019 2018

All Int'l Joint Research (1 results) Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results) Presentation (7 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results)

  • [Int'l Joint Research] ルンド大学(スウェーデン)2018

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Use of sterols to monitor surface water quality change and nitrate pollution source2019

    • Author(s)
      Nakagawa Kei、Amano Hiroki、Berndtsson Ronny、Takao Yuji、Hosono Takahiro
    • Journal Title

      Ecological Indicators

      Volume: 107 Pages: 105534-105534

    • DOI

      10.1016/j.ecolind.2019.105534

    • NAID

      120006988445

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 自己組織化マップによる地下水水質の分類2019

    • Author(s)
      中川 啓, 河村 明
    • Journal Title

      水循環 貯留と浸透

      Volume: 114 Pages: 25-28

    • Related Report
      2019 Annual Research Report
  • [Presentation] 硝酸性窒素による地下水汚染地域の土壌を用いたカラム実験2019

    • Author(s)
      竹盛匠吾, 中川 啓
    • Organizer
      日本地下水学会春季講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 農用地近くの観測井戸における地下水位変動についての基礎的研究2019

    • Author(s)
      倉本菜摘, 中川 啓
    • Organizer
      日本地下水学会春季講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Spatial Characteristics of Groundwater Chemistry in Unzen, Nagasaki, Japan2019

    • Author(s)
      Kei Nakagawa, Zhi Qiang Yu, Hiroki Amano, Ronny Berndtsson
    • Organizer
      16th Annual Meeting AOGS 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Nitrate Concentration Characteristics in an Intensely Polluted Area in Japan2019

    • Author(s)
      Kei Nakagawa, Hiroki Amano, Magnus Perssonn, Ronny Berndtsson
    • Organizer
      GQ 2019 (10th International Groundwater Quality Conference)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Preliminary evaluation of nitrate groundwater pollution and remediation in Shimabara Peninsula, Nagasaki, Japan2019

    • Author(s)
      Kei Nakagawa, Hiroki Amano, Ronny Berndtsson, Rudy Rossetto
    • Organizer
      46th IAH Congress
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 長崎県島原市内における土壌中の重金属濃度調査2019

    • Author(s)
      井村友美, 中川 啓
    • Organizer
      日本地下水学会秋季講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Groundwater Nitrate Pollution of an Agricultural Area in Japan: a Case Study in Shimabara Peninsula2019

    • Author(s)
      Kei Nakagawa
    • Organizer
      2019 4th Asia Conference on Environmental and Sustainable Development
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited

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Published: 2017-03-15   Modified: 2021-02-19  

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