Dynamics of baroclinic structure in Isahaya Bay and the northern Ariake Sea

2015 Fiscal Year Final Research Report

• Project/Area Number: 24360200
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Hydraulic engineering
• Research Institution: Kyushu University
• Principal Investigator: Yano Shinichiro 九州大学, 工学(系)研究科(研究院), 教授 (80274489)
• Co-Investigator(Kenkyū-buntansha): Akira Tai 九州大学, 高等研究院, 助教 (20585921) ; Yuji Sugihara 九州大学, 大学院総合理工学研究院 (70243970)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: 有明海 / 諫早湾 / 淡水影響域 / ROFI / 乱流微細構造 / 河川プリューム / 物質輸送

Outline of Final Research Achievements

Several field measurement campaigns and numerical hydrodynamic modeling in Ariake Sea were conducted to clarify baroclinic dynamics due to freshwater and water temperature inflow from rivers and impact of reclamation project in Isahaya Bay on the structure. As a result of the research, it became clear that i) salinity stratification dynamics can change due to scale of flooding, ii) impact of river water temperature on water temperature stratification is estimated by scale of river discharge, and iii) the reclamation project may affect development of stratification in only spring tide, but not in neap tide when anoxic bottom water can generally develop. From these results, fundamental characteristics of baroclinic structure in the Ariake Sea was understood.

Free Research Field

環境水理学