2016 Fiscal Year Final Research Report
Observation, modeling and restoration of sediments in polymictic lakes
| Project/Area Number |
26281039
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Modeling and technologies for environmental conservation and remediation
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| Research Institution | University of Tsukuba |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
日比野 忠史 広島大学, 工学(系)研究科(研究院), 准教授 (50263736)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | ポリミクティック / 湖沼 / 底質 / 石炭灰造粒物 / モデリング / 栄養塩溶出 |
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| Outline of Final Research Achievements |
Through the observation and modeling of nutrient dynamics, particularly related to phosphorus, in the surface sediments of Lake Kasumigaura (representative of polymictic lakes), we elucidated the physicochemical characteristics of water/sediment environment and the depth and chemical properties corresponding to the nutrient release. Based on the long-term experiments (around 6 months) during fall and summer periods, the effectiveness of granulated coal ash on nutrient suppression from anoxic sediments, i.e., its applicability to freshwater lakes, was confirmed and the suppression mechanism was clarified. The yearly changes in the vertical profiles of radioactive cesium derived from the Fukushima Dai-ichi Nuclear Power Plant accident in the surface sediments of five lakes were monitored and simulated with sediment advection-diffusion model.
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| Free Research Field |
水環境科学
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