| Project/Area Number |
26630223
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Hydraulic engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
Umeda Makoto 東北大学, 工学(系)研究科(研究院), 准教授 (10447138)
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| Co-Investigator(Kenkyū-buntansha) |
NAKAGAWA Fumiko 名古屋大学, 大学院環境学研究科, 准教授 (70360899)
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 湖沼環境 / 水工水理学 |
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| Outline of Final Research Achievements |
In Lake Izunuma, which is highly eutrophicate, we conducted field measurements on the
dominant macrophyte of lotus (Nelumbo nucifera) in this lake with regard to seasonal biomass change and nutrient cycling. Based on those data, we developed a numerical model to analyze water quality and vegetation in the lake. By the use of triple oxygen isotopes of dissolved oxygen, gross primary production was estimated in a oligotrophic lake, Lake Shikotsu and Lake Kuttara, and in a mesotrophic lake, Lake Biwa. By the use of triple oxygen isotopes in nitrate nitrogen, new production rate was also estimated. By considering the difference between those factors, regeneration production was estimated.
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