Coastal disposal is becoming significant in recent years due to the difficulty of locating inland disposal sites. In designing coastal disposal sites, the performance evaluation of the seawall barrier is of great importance. The effect of tide on the contaminant movement in coastal disposal sites had not been considered in past studies, while water flow under the seabed can be affected by the existenceof tide.
To evaluate the barrier performance of coastal disposal sites, the advective-dispersive transport of contaminant under the seabed was analyzed numerically for major seawall barrier structures under several conditions including the existence of semidiurnal tide. Tide showed considerable controlling effect on the contaminant leakage through the barrier.
