Numerical simulation on the behavior of discharge from Chikugo River in Ariake Sea by using a 3-D flow model with wind shear stress acting on the water surface
| Project/Area Number |
23656307
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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 | Kyushu University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
CHIBA Satoshi 四日市大学, 環境情報学部, 教授 (90298654)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2011: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 環境水理学 / 沿岸海域環境学 / 流動シミュレーション / 閉鎖性内湾 / 塩淡清掃 / 風応力 / 吹送流 / 3次元流動シミュレーショう / 大気流動シミュレーション / 大気海洋相互作用 / 有明海環境異変 / 諫早湾干拓事業 |
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| Research Abstract |
The project leader found that the salinity stratification is formed over the whole region of Isahaya Bay in the rainy season and that the salinity in the deep region of Isahaya Bay decreases to about half value of ordinary sea water in some cases and it recovers in some cases. This project was made under the hypothesis that the salinity stratification might be due to the discharge from the rivers running into Ariake Sea and its appearance and disappearance might be generated by local wind in Isahaya Bay. The obtained results are as follows: 1)The salinity stratification over the whole region of Isahaya Bay is mainly due to the discharge from Chikugo River. 2)The north-northeasterly wind transports the water mass of low density near the water surface from Ariake Sea to Isahaya Bay.3)The south-southwesterly wind tends to suppress the inflow of the water mass of low density from Ariake Sea to Isahaya Bay and to promote conversely its outflow from Isahaya Bay toAriake Sea.
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Report
(4 results)
Research Products
(35 results)
