書誌事項
- タイトル別名
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- Nitrogen Mass Change and Cycle in Lake Biwa
- ビワコ ニ オケル チッソ ノ スイチュウ ナイ ソンザイリョウ ト ジュンカン カテイ
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The mass change of nitrogen in Lake Biwa was shown, and its cycle was discussed and compared with the input/output loading. Nitrogen exists at 10.5X103 ton in average, and its minimum and maximum mass are 7.6X103 ton, 13.4X103 ton, respectively. Its average mass is equivalent to 133% of the annual input loading, resulting in 1.6 months of residence time, which is shorter than 5.5 years of hydraulic retention time. This indicates that nitrogen in the lake is removed by settling onto the lake bottom or denitrification, and the removed mass is estimated to be 71% of the input loading. Phytoplanktons mainly utilize ammonium nitrogen in epilimnion whose mass is only 1% of the total mass in the lake. rather than other inorganic nitrogen amounting to more than ten-fold of ammonium nitrogen. During the stratification period, almost all decomposed nitrogen in the organic matter is oxidized into nitrate, and half of them is likely to be removed by denitrification.
収録刊行物
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- 水環境学会誌
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水環境学会誌 26 (10), 663-669, 2003
公益社団法人 日本水環境学会
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詳細情報 詳細情報について
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- CRID
- 1390001205080480384
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- NII論文ID
- 10011726849
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- NII書誌ID
- AN10372439
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- COI
- 1:CAS:528:DC%2BD3sXpsVKlsrk%3D
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- ISSN
- 18813690
- 09168958
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- NDL書誌ID
- 6709488
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可
