Portal de Periódicos da CAPES

CHARACTERISTICS OF CURRENTS IN THE NORTHERN MOUTH OF ISAHAYA BAY

2012; Volume: 68; Issue: 4 Linguagem: Inglês

10.2208/jscejhe.68.i_1687

2185-467X

Akira Tai, Shuhei Ogitsuka, Tomonori Saita, Akihide TADA, Hiroaki Tsutsumi, Toshimitsu Komatsu,

Food Industry and Aquatic Biology

Ten years or more have passed since large-scale poor cultured laver harvests which arose in the head of Ariake Bay in 2000 winter.However, except for cultured laver, fish catches including a bivalve has decreased and does not show even a sign of recovery. When the drainage gate is opened over a long period of time, it is thought indispensable towards the Ariake Bay reproduction to investigate the change and influence of the aquatic environment of Isahaya Bay and Ariake Bay before and after opening the drainage gate.In this study, the field observation on flow regime at the northern mouth of Isahaya Bay was carried out under the stratified and mixing condition twice in 2010. As a result, structure of cavity flow appeared at the mouth of Isahaya Bay in all condition of both flood and ebb tide. Now, various flow regime has produced on various conditions at the northern mouth of Isahaya Bay, if potential flow will be recovered by opening the gate, it is expected flow regime changes a lot.