| Project/Area Number |
21510001
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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 |
Environmental dynamic analysis
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| Research Institution | Hokkaido University |
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Principal Investigator |
SUKIMOTO Atsuko 北海道大学, 大学院・地球環境科学研究院, 教授 (50235892)
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| Co-Investigator(Kenkyū-buntansha) |
ISHIKAWA Mamoru 北海道大学, 大学院・地球環境科学研究院, 准教授 (50373452)
IWAHANA Go 北海道大学, 大学院・地球環境科学研究院, 特任助教 (70431327)
MIKAMI Hidetoshi 北海道総合研究機構環境科学研究センター, 主査 (80442622)
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| Project Period (FY) |
2009 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2009: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 水循環 / 土地利用 / 同位体マップ / 硝酸同位体比 / 水同位体比 / 河川水 |
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| Research Abstract |
Isoscape monitoring network was established, and Hokkaido Isotope map on water and nitrogen was made on river, ground water, and lake water. Precipitation was also observed at monitoring stations. Water isotope map showed spatial distribution of d-excess differs between summer and winter reflection the moisture source of winter precipitation generally in Hokkaido. However, constant and also high d values were observed in rivers south of Shikotsu lake, indicating a large ground water system probably connecting to Shikotsu lake. Nitrate concentration was high in the rivers in farmland. Nitrate d^<15>N showed also wide range but mostly 0 to 8‰. Variation may depend on the difference in source of N.
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