In recent years, to the bay near a big city, nutrient salt, such as a nitrate and an orthophosphate have flowed in all over seawater because of the increase in population, and industrial activity. And the oxygen in seawater decreases and it has become the environment where marine creatures cannot live easily.
In this study, in order to improve the seawater quality in a harbor, a new type of reflection wave dissipater from piers and sea walls is developed. Especially, for activating the aeration of basin water, we have used wave interaction process with the dissipater. The piston mode wave resonance in the water chamber of the dissipater is a main driving force to activate the entrapment and diffusion of air bubbles to the water.
