2015 Fiscal Year Final Research Report
Study on a natural cleaning mechanism of pollutants in the water system of Lake Baikal.
| Project/Area Number |
25304001
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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 | 海外学術 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Tokyo Metropolitan University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
Watanabe Makiko 首都大学東京, 都市環境科学研究科, 教授 (10175119)
Fujitake Nobuhide 神戸大学, 大学院農学研究科, 教授 (50243332)
Kobayashi Takayuki 日本大学, 生物資源科学部, 助教 (10551228)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | バイカル湖 / セレンゲ川 / セレンゲデルタ / 鉱山開発 / Suspended Solids / 溶存有機物 / 低濃度汚染 / 土地利用変化 |
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| Outline of Final Research Achievements |
Selenge River is the largest tributary in all of rivers flowing into the Lake Baikal. Watersheds of the tributary are strongly affected by large scale reclamation of the land for mining and agriculture.However, there is no report about fatal pollutions in the lake Baikal, indicating that natural cleaning systems should be addressed for removal of pollutants. In this study, suspended solids (SS) are mainly focused as a carrier of pollutants to elucidate the mechanism of SS removal in the river system. As a result, some heavy metals attached onto SS increase their concentration in the downstream of a mining area, indicating contamination process due to drainage from mining. Sedimentation of SS particles was observed in the downstream of a confluence point with a tributary. At the Selenge delta, the river flow spread into many small tributaries, resulting that decrease in flow rate leaded sedimentation of SS particles accompanied by accumulation of heavy metals in the bottom sediment.
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| Free Research Field |
環境化学
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