Experimental study on pollutant transport in surf zone

Coastal and offshore areas,especially in mild sloping beaches,are extremely dynamic regions where the advection and diffusion of pollutants are more complicated due to the distortion and breaking of wave.The experiments of pollutant trans port for diverse wave cases in surf zone were carried out on the two gently sloping beach of 1:100 and 1:40 slope.The pollutant extension areas at different times for diverse incident wave cases were provided.The movement range and direction of pollutants under the action of regular and irregular waves,diverse wave amplitude cases were provided and investigated.The distribution tendency and direction for pollutant transport in surf zone were also provided and studied in this paper.It is indicated that,in surf zone,the movement direction of pollutants is mainly along shore,almost independent of incident wave direction,and that the movement state of pollutants is influenced by incident wave cases and quite complicated for diverse wave cases,and different from the pollutant movement under the action of pure current.