A Study on Counter Measures against the Formation of Oxygen-Depleted Water near the Head of the Ariake Bay using an Ecosystem Model

Abstract

Countermeasures against the formation of oxygen-depleted water in the bottom layer near head of the Ariake bay were studied using the ecosystem model developed by authors (2010). Three options of the countermeasures were chosen to satisfy the three conditions: effectiveness, feasibility and capability of numerical simulations. The first option is a reduction of load from the land, the second option is increase in Sarubow which is a bivalves live in the tidal flat near the head of the bay and the third option is increase in Oyster beds. The results of numerical simulations showed the effectiveness of each option quantitatively. The numerical experiments under some virtual conditions were also conducted to understand the problem. The numerical results presented some useful indications to solve the problem.