| Project/Area Number |
20780178
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Irrigation, drainage and rural engineering/Rural planning
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| Research Institution | Tokyo University of Agriculture |
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Principal Investigator |
SUZUKI Shinji Tokyo University of Agriculture, 地域環境科学部, 講師 (00459710)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2009: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2008: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 気候変動 / 寒冷地 / 凍土 / 不凍水 / 水移動 |
|---|
| Research Abstract |
Contribution of both the matric potential and osmotic potential on depression of the water potential of frozen volcanic ash soils associated with soil freezing was assessed in Abashiri region of Hokkaido Prefecture, Japan. The effect of the osmotic potential was negligibly small when EC_<1:5> was less than 0.17dSm^<-1>. Using those results, in-situ monitoring of matric potential was conducted, and changes in the matric potential of frozen soil layer were compared with that of unfrozen subsoil. It is revealed that the matric potential of unfrozen subsoil associated with changes in the matric potential of the frozen soil layer. The matric potential of frozen soil layer was considerably smaller than that of unfrozen subsoil.
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