| 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)
川上 智則 (川上 智規) 富山県立大学, 短期大学部・環境システム工学科, 教授 (10249146)
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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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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2009: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2008: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2007: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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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 / 湯桧曽川 / 窒素流出量 / 土木環境システム / 窒素飽和 / 利根川 |
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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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