海岸带波浪破碎区污染物运动的实验研究

由于波浪在岸滩上的演化、破碎使得污染物在海岸带的运动规律变得十分复杂。通过实验模拟,研究了缓坡海岸(坡度为1:100和1:40)波浪破碎区污染物的运动规律,给出了不同时刻污染物在该区域的运动变化趋势。讨论并分析了在斜向规则入射波、不规则入射波及不同入射波波高作用下污染物在沿岸波浪破碎区域的运动变化方向和相应的运动范围分布规律。给出并分析了近岸波浪破碎区域污染物运动分布规律。

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.