Studies on the Occurrence of Hypoxic Water in the Interior Parts of the Ariake Sea and its Preventive Measures

有明海内层缺氧水的发生及其预防措施的研究

• 批准号: 17380146
• 负责人: SEGUCHI Masahiro
• 金额: $ 8.91万
• 依托单位: Saga University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17380146/
• 关键词: Ariake Sea; hypoxic water; dissolved oxygen; pycnocline; vertical diffusion coefficient; inorganic nitrogen; prevention block; upwelling current; アンモニア態窒素; イトゴカイ; 塩分; 酸素消費速度; DO; 密度; 成層; 躍層

The actual conditions of hypoxic water which occurred in the western interior parts of the Ariake Sea were clarified based on the data of dissolved oxygen concentration (DO), velocity (V), salinity (S) and water temperature (T) at the 30 cm height from the sea-bottom measured hourly in summer of 2005-2007 using two multi-items measures with DoPa communication system. The relationships between the occurrence of hypoxic water and vertical structure of density calculated from Sand Talong the measurement lines in longitudinal and lateral directions set in this sea area were also grasped, and it was shown that the density pycnocline were always formed at the time of the outbreaks of hypoxic water and the vertical diffusion coefficient decreased rapidly near the density pycnocline. Moreover the consumption rates of DO in the bottom layer depended largely on the amount of suspended organic mutter there. On the other hand, the analysis results of DO data during 34 years by a two-layer box model indicated that the vertical diffusion coefficients decreased rapidly, and on the contrary, the consumption rate increased largely as the density stratification parameter rose greatly in summer. The occurrence of hypoxic water in summer was due to the fact that with the formation of the density pycnocline, the vertical diffusion flux of DO from the surface layer to the bottom one in the sea-water column became more than the consumption of DO in the bottom layer. It was also presented experimentally that the installation of a triangle block with special shape on the sea-bottom was effective for prevention of the occurrence of hypoxic water in the study sea area

利用2005-2007年夏季DoPa通信系统的2个多项目测量数据，对有明海西部内陆水域溶解氧浓度（DO）、流速（V）、盐度（S）和30 cm水深水温（T）进行逐时测量，分析了有明海西部内陆水域缺氧的实际情况。掌握了该海域纵向和横向测线上由沙塔计算的密度垂直结构与缺氧水出现的关系，发现缺氧水出现时总是形成密度跃层，在密度跃层附近垂直扩散系数迅速减小。底层溶解氧的消耗速率在很大程度上取决于底层悬浮有机物的数量。利用双层箱模式对34 a来的溶解氧资料进行分析，结果表明，夏季随着密度分层参数的增大，溶解氧的垂直扩散系数迅速减小，而溶解氧的消耗率则显著增大。夏季低氧水体的出现是由于密度跃层的形成，海水柱中DO由表层向底层的垂直扩散通量大于底层溶解氧的消耗。实验还表明，在研究海域海底安装特殊形状的三角形挡块，可以有效地防止缺氧水的发生

项目成果

「研究成果報告書概要(和文)」より

摘自《研究结果报告摘要（日文）》

• 发表时间: 2005
• 作者: Kawauchi;et. al.;Nishimura et al.;Dezawa et al.;Yoshizawa et al.;星野 幹雄;星野 幹雄
• 通讯作者: 星野 幹雄

Distribution of Heavy Metals in Interstitial Waters and Sediments at Different Sites in Ariake Bay

有明湾不同地点间隙水和沉积物中重金属的分布

• 发表时间: 2007
• 期刊: E-Water
• 作者: Masaaki;Tabata;Abdul;Ghaffar;Yui;Eto;Jun;Nishimoto;Koichi;Yamamoto
• 通讯作者: Yamamoto

有明海奥部干潟域における脱窒菌群の生息分布と底質環境について

有明海内滩滩区反硝化细菌生境分布及沉积环境

• 发表时间: 2007
• 作者: Masaaki;Tabata;Abdul;Ghaffar;Yui;Eto;Jun;Nishimoto;Koichi;Yamamoto;Masahiro Seguchi;瀬口昌洋;瀬口 昌洋・郡山 益実・古賀 あかね・野田 美幸
• 通讯作者: 瀬口 昌洋・郡山 益実・古賀 あかね・野田 美幸

Occurrence of hypoxic water in the interior parts of the Ariake Sea and its preventive measures

有明海内陆缺氧水的发生及其预防措施

• 发表时间: 2005
• 期刊: Bulletin of the Faculty of Agriculture, Saga University 90
• 作者: Masaaki;Tabata;Abdul;Ghaffar;Yui;Eto;Jun;Nishimoto;Koichi;Yamamoto;Masahiro Seguchi
• 通讯作者: Masahiro Seguchi

有明海奥部西岸域における貧酸素水塊の発生機構の解明とその防止法に関する研究

有明海内西海岸地区缺氧水团的生成机制及其防治方法的研究

• 发表时间: 2005
• 期刊: 佐賀大学有明海総合研究プロジェクト成果報告集 1
• 作者: Masaaki;Tabata;Abdul;Ghaffar;Yui;Eto;Jun;Nishimoto;Koichi;Yamamoto;Masahiro Seguchi;瀬口昌洋
• 通讯作者: 瀬口昌洋