To create a new artificial shallow area in a hypoxic bay, we propose methods to determine the depth for the area and how to evaluate its effectiveness. The study was conducted in Mikawa Bay, Central Japan. In summer season, serious hypoxia is observed in the bottom layer, which becomes progressively lethal to the macrobenthos. Therefore the aim of developing a new shallow area should be to avoid hypoxia. The circumstances on which we developed the new method are described. Future technical subjects for the environmental restoration are also described.
