2009 Fiscal Year Final Research Report
Study on sediment and nutrients transport in watershed and their management -targeting subtropical area-
| Project/Area Number |
17106006
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| Research Category |
Grant-in-Aid for Scientific Research (S)
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| Allocation Type | Single-year Grants |
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| Research Field |
水工水理学
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
IKEDA Syunsuke Tokyo Institute of Technology, 大学院・理工学研究科, 教授 (60016590)
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| Co-Investigator(Kenkyū-buntansha) |
ISHIKAWA Tadaharu 東京工業大学, 大学院・総合理工学研究科, 教授 (50159696)
OKAMOTO Mineo 東京海洋大学, 海洋科学部, 准教授 (70345403)
SAKAI Kazuhito 琉球大学, 農学部, 教授 (10253949)
AKAMATSU Yoshihisa 東京理科大学, 理工学部, 助教 (30448584)
OSAWA Kazutoshi 宇都宮大学, 農学部, 准教授 (30376941)
AKAHORI Ryosuke 東京工業大学, 大学院・理工学研究科, 助教 (50452503)
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| Project Period (FY) |
2005 – 2009
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| Keywords | 水工水理学 / 水圏現象 / 水質汚濁防止・浄化 / 自然現象観測・予測 / 環境調和型農林水産 |
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| Research Abstract |
The transport processes of sediment and nutrients in a watershed in Ishigaki island, Okinawa, were studied by using various observation methods including stable isotope analysis. They were simulated by using numerical models by identifying several factors from the observations. The models predict that a proper combination of civil engineering countermeasure and change of farming method can reduce the sediment yield from the watershed by 74%. Observations of water quality and coral recruitment test in Nagura bay indicate that the water is eutrophicated and the corals cannot grow for a long time. Based on these observations, a quantitative target of the reduction of sediment and nutrients yield in watershed can be decided rationally.
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Research Products
(34 results)
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[Presentation] Introduction of a new coral reef restoration technology applicable for Indonesia2009
Author(s)
Okamoto, M., Roeroe, K.A., Yap, M., Oyamada, K., Fujiwara, S.
Organizer
Coral Reef Management Symposium on Coral Triangle Area
Place of Presentation
Jakarta, Indonesia
Year and Date
2009-10-13
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