A model experiment is conducted to investigate water-exchange performance of newly-developed breakwater with vertical slits. It is confirmed that a large amount of water can be introduced to the backside area of the breakwater. Variation of submergence area of the slits due to tide change has no significant effect on the waterexchange performance of the breakwater, which is advantageous for the breakwater to be used in the large-tidechanging inland sea.
Also conducted is a model experiment for a vertically water-mixing wharf, which shows more than the amount of surface water obtained in the breakwater experiment is introduced to the bottom layer in front of the wharf.
