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2013 Fiscal Year Final Research Report

Analysis of nitrate pollution in groundwater with age dating

Research Project

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Project/Area Number 23510004
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Environmental dynamic analysis
Research InstitutionShinshu University

Principal Investigator

TODA Hideshige  信州大学, 理学部, 教授 (60291382)

Co-Investigator(Kenkyū-buntansha) MIYABARA Yuichi  信州大学, 山岳科学総合研究所, 准教授 (80311330)
Research Collaborator ASAI Kazuyoshi  (株)地球科学研究所, 理学博士
Project Period (FY) 2011 – 2013
Keywords年代解析 / 地下水 / 硝酸塩汚染 / 窒素安定同位体比 / 六フッ化イオウ
Research Abstract

Groundwater age dating by using an inert gas (SF6) showed that the residence time of groundwater was 2 to 33 years in a village in southern Nagano. Nitrate concentration in wells of tap water sources and observation wells (intake depth >30m) showed maxima at around 20 years residence time (recharged in1993 to 1994) and a declining trend in less than 15 years residence time (recharged after 1997). The amount of fertilizer including manure was consistently decreasing during the last 40 years in the village, and the nitrate concentration of deep wells might reflect this decrease in nitrogen input.

  • Research Products

    (6 results)

All 2014 2013 2012

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

  • [Journal Article] Effects of adding alkaline material on the heavy metal chemical fractions in soil under flooded and non-flooded conditions2014

    • Author(s)
      Sumi, H., Kunito, T., Ishikawa, Y., Nagaoka, K., Toda, H., and Aikawa, Y
    • Journal Title

      Soil Sediment Contam. Soil and Sediment Contamination

      Volume: 23 Pages: 899-916

    • DOI

      10.1080/15320383.2014.890169

    • Peer Reviewed
  • [Journal Article] 長野県諏訪地域における地下水の水質2014

    • Author(s)
      宮原裕一・木下悠史
    • Journal Title

      信州大学環境科学年報

      Volume: 36 Pages: 16-28

    • URL

      http://www.shinshu-u.ac.jp/group/env-sci/Vol36/V36_2014.htm

  • [Journal Article] 霧ヶ峰踊場湿原における火入れ延焼が湿原の水質に及ぼす影響2014

    • Author(s)
      中島裕・戸田任重
    • Journal Title

      信州大学環境科学年報

      Volume: 36 Pages: 50-53

    • URL

      http://www.shinshu-u.ac.jp/group/env-sci/Vol36/V36_2014.htm

  • [Presentation] 長野県諏訪地域における地下水の水質と資源量の推定2013

    • Author(s)
      木下悠史・宮原裕一・浅井和由
    • Organizer
      第22回環境化学討論会
    • Place of Presentation
      府中
    • Year and Date
      20130731-0802
  • [Presentation] 年代解析を併用した地下水の硝酸塩汚染の解析(2)2013

    • Author(s)
      戸田任重・浅井和由・宮原裕一
    • Organizer
      日本陸水学会第78回大会
    • Place of Presentation
      大津
    • Year and Date
      2013-09-12
  • [Presentation] 年代解析を併用した地下水の硝酸塩汚染の解析2012

    • Author(s)
      戸田任重・浅井和由・宮原裕一
    • Organizer
      日本陸水学会第77回大会
    • Place of Presentation
      名古屋
    • Year and Date
      2012-09-17

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Published: 2015-07-16  

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