人工沙坝喂养侵蚀海滩效果研究

Study of The Effect of the Artificial Sandbank on the Eroded Beach Nourishment

针对北戴河海滩侵蚀现状,通过物理模型试验及FLOW-3D数值模拟,获得在不同水位与波高条件下人工沙坝作用下的波浪消减与岸滩演变效果,旨在获取相对坝顶水深和波陡对波浪透射系数的影响以及不同水位情况下岸滩演变规律。研究结果表明:相对坝顶水深与波陡是影响波浪透射系数的关键因素,透射系数随相对坝顶水深的增大而增大,随波陡的增大而减小,水位越低,人工沙坝的养滩效果越好。

Aiming at the current situation of the beach erosion of the Beidaihe coast,this paper is to obtain the influences of relative water depth of the sandbar top and wave steepness on wave transmission coefficient and coastal evolution using physical experiment and FLOW-3Dto simulate the wave consumption under different water levels and extreme wave conditions.The results show that the relative water depth and wave steepness are the two key factors affecting wave transmission coefficient.The transmission coefficient increases with the relative water depth,while decreases with the increase of wave steepness.The lower the water level is,the better the results of coastal evolution.