流域レベルでの水田の窒素除去量評価に関する研究 Evaluation of Nitrogen Removal in Paddy Fields at a Watershed Level

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A high nitrate nitrogen concentration in leaching water from a tea field is observed in Japan. A small river called the Tanno River is located in a watershed where a tea field is caltivated. There are paddy fields along the Tanno River and denitrification occurs there during irrigation period. The authors and the Ministry of Agriculture and Fishery measured the discharge and water qualities at four poins on the Tanno River and measured denitrification rate at three paddy fields. The authors simulated the discharge and N concentration for the four points using the water quality tank mode (WQSTM), which takes into account the denitrification of paddy fields and N accumulation in soils. The authors also simulated the water qualities for the four points and evaluated the quantity of N removed from the on the basis of the obtained results. An aerial ratio of the paddy field to the tea field is 19.6% in the watershed, and the rate of nitrogen removal reached 41% during the irrigation period. The annual average rate of N removal was 14%. Moreover, the authors demonstrated that a future change in N concentration can be predicted by this WQSTM.

収録刊行物

  • 水環境学会誌 = Journal of Japan Society on Water Environment

    水環境学会誌 = Journal of Japan Society on Water Environment 27(10), 665-670, 2004-10-10

    公益社団法人 日本水環境学会

参考文献:  11件中 1-11件 を表示

被引用文献:  3件中 1-3件 を表示

各種コード

  • NII論文ID(NAID)
    10013650559
  • NII書誌ID(NCID)
    AN10372439
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09168958
  • NDL 記事登録ID
    7118355
  • NDL 雑誌分類
    ZN5(科学技術--建設工学・建設業--都市工学・衛生工学)
  • NDL 請求記号
    Z16-1045
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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