深水湖の長期水質予測シミュレーション  [in Japanese] Numerical Simulation of Long-term Changes in Water Quality in Deep Lakes  [in Japanese]

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Author(s)

Abstract

本報では,深水湖として琵琶湖を取り上げ,今後100年間に気温が上昇する場合と上昇しない場合の数値シミュレーションを実施し,気温上昇が琵琶湖の水質,生態系に及ぼす影響を予測した.その結果,成層期の底層水温の上昇率が表層水温の上昇率よりも高かったため,全循環は毎年継続して発生した.また,溶解度の減少に伴う溶存酸素濃度の低下は,栄養塩の溶出と富栄養化を引き起こし,溶存酸素濃度のさらなる低下を招いた.[本要旨はPDFには含まれない]

The effects of global warming on the water quality and ecosystem of Lake Biwa were predicted by carrying out numerical simulations in the cases when atmospheric temperature increases by 5 oC and does not change in the following 100 years. As a result, the overturn of waters occurred every year since the increasing rate of water temperature at water bottom during the stratified seasons was larger than that at water surface. The decrease in dissolved oxygen concentration due to decreasing solubility caused the release of nutrients from sediments and eutrophication, resulting in the further decrease in dissolved oxygen concentration.[This abstract is not included in the PDF]

Journal

  • SEISAN KENKYU

    SEISAN KENKYU 63(1), 65-68, 2011

    Institute of Industrial Science The University of Tokyo

Codes

  • NII Article ID (NAID)
    130000670880
  • NII NACSIS-CAT ID (NCID)
    AN00127075
  • Text Lang
    JPN
  • Journal Type
    大学紀要
  • ISSN
    0037-105X
  • NDL Article ID
    11069244
  • NDL Source Classification
    ZM2(科学技術--科学技術一般--大学・研究所・学会紀要)
  • NDL Call No.
    Z14-198
  • Data Source
    NDL  J-STAGE 
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