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Evaluation for future and present condition on a roll of forest as nonpoint source of nitrogen for the Seto Inland Sea

Research Project

Project/Area Number 15K00570
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Environmental impact assessment
Research InstitutionOsaka Institute of Technology

Principal Investigator

Komai Yukio  大阪工業大学, 工学部, 教授 (00446808)

Research Collaborator KUNIMATSU Takao  
Project Period (FY) 2015-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords瀬戸内海 / 森林 / 渓流水 / 窒素濃度 / 窒素比流出負荷量 / 分布型流出モデル / IFAS / シミュレーション / 窒素流出負荷量 / 森林域 / 窒素濃度分布 / 分布型流出解析モデル / 硝酸態窒素濃度 / 瀬戸内海流域圏 / GIS / 流域面積 / 自然的・社会的要因
Outline of Final Research Achievements

The specific load and the amount of nitrogen flowing into the Seto Inland Sea from the forest area were estimated by using nitrogen concentration in mountain streams, which were not affected by any artificial pollution and the specific discharge by the distributed runoff model constructed by IFAS of ICHARM, Public Works Research Institute.
The specific load of nitrogen in forest area of the Seto Inland Sea watershed was calculated 5.8 kg/ha/year as average value for the two years from 2013 and 2014. This result showed that the unit load of nitrogen by the Ministry of Environment, which was 6.9 kg/ha/year, was 1.1 times larger than the specific load of nitrogen based on actual data. Therefore, it was suggested that the amount of nitrogen loadings by the Ministry of Environment was over estimated.

Report

(4 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (10 results)

All 2018 2017 2016

All Presentation (10 results) (of which Int'l Joint Research: 5 results)

  • [Presentation] 岡山県の森林域から流出する窒素負荷量の推定2018

    • Author(s)
      森澤尚平,駒井幸雄,津田守正
    • Organizer
      第52回日本水環境学会年会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 福岡県と大分県の渓流水中に見出された高濃度の硝酸態窒素の原因について2018

    • Author(s)
      岡本吉登,森澤尚平,駒井幸雄,仁科一哉, 森野 悠, 國松孝男
    • Organizer
      第52回日本水環境学会年会
    • Related Report
      2017 Annual Research Report
  • [Presentation] The Concentration and Distribution of Nitrogen in Mountain Streams in the Northeastern Kyushu, Japan2017

    • Author(s)
      Yukio Komai, Yoshito Okamoto, Shohei Morisawa, Takao, Kunimastu
    • Organizer
      18th IWA Diffuse Pollution and Eutrophication Conference
    • Place of Presentation
      , The Luskin Conference Center, UCLA, Los Angeles, USA
    • Year and Date
      2017-08-14
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Estimation of Nitrogen Loadings from Forest Area in the Watershed of Hiji River, Japan by using the IFAS model2017

    • Author(s)
      Shohei Morisawa, Yukio Komai, Tsuda, Takao Kunimastu
    • Organizer
      18th IWA Diffuse Pollution and Eutrophication Conference
    • Place of Presentation
      , The Luskin Conference Center, UCLA, Los Angeles, USA
    • Year and Date
      2017-08-14
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 大分県の渓流水における硝酸態窒素濃度とその分布に影響する要因の解析2017

    • Author(s)
      森澤尚平, 駒井幸雄, 岡本吉登, 國松孝男
    • Organizer
      第51回日本水環境学会年会
    • Place of Presentation
      熊本大学, 熊本市
    • Year and Date
      2017-03-18
    • Related Report
      2016 Research-status Report
  • [Presentation] 福岡県東部地域における渓流水中硝酸態窒素濃度の分布とその特徴2017

    • Author(s)
      岡本吉登, 駒井幸雄, 森澤尚平, 國松孝男
    • Organizer
      第51回日本水環境学会年会
    • Place of Presentation
      熊本大学, 熊本市
    • Year and Date
      2017-03-17
    • Related Report
      2016 Research-status Report
  • [Presentation] The Concentration and Distribution of Nitrogen in Mountain Streams in the Northeastern Kyushu, Japan2017

    • Author(s)
      Komai, Y., Okamoto, Y., Morisawa, S., Kunimastu, T.
    • Organizer
      The 18th International Conference on Diffuse Pollution and Eutrophication
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Estimation of Nitrogen Loadings from Forest Area in the Watershed of Hiji River, Japan by using the IFAS Model2017

    • Author(s)
      Morisawa, S., Komai, Y., Tsuda, M., Kunimastu, T.
    • Organizer
      The 18th International Conference on Diffuse Pollution and Eutrophication
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evaluation of Mountain Area as Non-Point Source of Nitrogen for Seto Inland Sea: The Northern Shikoku Region, JAPAN2016

    • Author(s)
      Shohei Morisawa, Yukio Komai, Takao Kunimatsu
    • Organizer
      EMECS'11 - Sea Coast XXVI Joint Conference
    • Place of Presentation
      Azimut Hotel, Sankt peterburg, Russia
    • Year and Date
      2016-08-23
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 四国地方の渓流水における硝酸態窒素濃度分布とその特徴2016

    • Author(s)
      森澤尚平、駒井幸雄、國松孝男
    • Organizer
      第50回日本水環境学会年会
    • Place of Presentation
      徳島市
    • Year and Date
      2016-03-16
    • Related Report
      2015 Research-status Report

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Published: 2015-04-16   Modified: 2019-03-29  

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