Abstract
In order to improve the seawater quality in a harbor, a new type of pile supported breakwater with a water chamber was examined experimentally. The new breakwater is comprised of an inclined plate array as a front wall and a curtain wall as a rear wall. A horizontal plate is also attached to the rear wall at the lower end. Especially, for activating the aeration of basin water, the wave interaction process with the breakwater near the water surface was enhanced. 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. Both the functions of wave energy dissipation and activation of the aeration have been examined. It is seen that the front wall of down fin type is most effective to increase dissolved oxygen rate in the water.
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