| Project/Area Number |
25420561
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Civil and environmental engineering
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| Research Institution | Fukuoka University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
YAMASAKI KOREYOSHI 福岡大学, 工学部, 教授 (00038100)
IYOOKA HIROKI 福岡大学, 工学部, 助教 (40432869)
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| Co-Investigator(Renkei-kenkyūsha) |
KUSUDA TETUYA 九州大学, 工学部, 名誉教授 (50037967)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | 浚渫窪地 / 底泥 / 埋戻し / 貧酸素水塊 / 酸素消費量 / 埋立 / 酸素消費速度 / 埋め戻し / 浮泥 / 環境修復 / 酸素消費 / 環境改善 |
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| Outline of Final Research Achievements |
Because the bed mud of the Muromi River river mouth was used as a material for reclamation of the coast development of the 1980s in Hakata Bay, two big borrow pit are existed around the Momochi area in Fukuoka City. Around the two big borrow pits in Hakata bay, hypoxic water mass has occurred al-most every year in the summer season. Bed mud dredged during port improvement work has been re-turned to borrow pit as backfill carried out by Fukuoka City and Ministry of Land, Infrastructure and Transport since 2011.
Therefore, restoration action is urgent work to restore damaged ecosystems. One of the interesting methods to restore the damaged water ecosystems, has been conducted in the borrow pits in Hakata Bay by using maintenance dredging sediments as Mikawa Bay. In this study, bed mud oxygen demand is one of the important factors to evaluate for restoration of bottom environment.
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