2009 Fiscal Year Final Research Report
Influence of air-contaminants transported from metropolitan area on nitrogen saturation phenomenon in the upper stream of Tone river.
| Project/Area Number |
19560556
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Civil and environmental engineering
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| Research Institution | Gunma National College of Technology |
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Principal Investigator |
AOI Toru Gunma National College of Technology, 環境都市工学科, 教授 (90270222)
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| Co-Investigator(Kenkyū-buntansha) |
MIYAZATO Naoki 群馬工業高等専門学校, 環境都市工学科, 助教 (00435413)
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| Co-Investigator(Renkei-kenkyūsha) |
KAWAKAMI Tomonori 富山県立大学, 環境工学科, 教授 (10249146)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 水資源 / ノンポイント汚染 / 窒素飽和現象 / 利根川源流域 / 硝酸イオン |
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| Research Abstract |
It has been reported that the nitrogen concentration at Tone River was more than 1mg/1 even in the upper stream area with a forested watershed. Therefore, the nitrogen concentration of the stream-water at the Yubiso river, one of the tributaries of Tone River, and rain fall on its watershed and Nikagi river were analyzed to investigate the effect of preferential elution and nitrogen saturation. The annual wet deposition of nitrogen to Yubiso river watershed were 12.1kgN/ha/y. The annual nitrogen runoff of Yubiso river watershed were 12.5kgN/y. It was suggested that nitrogen saturation on the upper stream at Tone river watershed was on going.
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