潮流和潮余流对海湾和沿岸海域污染物质的迁移和分散所起的重要作用,已为大家所共知。潮余流亦称为潮余环流,它导致湾内的海水循环,促进与外海水的交换。然而,它是欧拉型的。溶解在海水中和以悬浮体形式混合在海水中的污染物质的迁移,与海水质点的运动一样,具有拉格朗日性质。海水质点在潮汐海区内的迁移,并不仅仅与潮余流(不考虑非潮汐引起的常流)有关,这个事实已引起许多研究者的注意。浅水波因速度切变产生水质点的斯托克斯漂移的现象已早为人们所知。根据完全相似的原理,潮流场的速度切变,也同样会导致水质点在一个潮周期后不再回复到原处,而产生拉格朗日漂 It is well known to all that the important role played by tides and tides in the migration and dispersion of pollutants in the gulf and coastal waters. The tidal stream, also known as the tidal current, leads to the circulation of seawater within the bay and the exchange with the open sea. However, it is Euler-type. The migration of pollutants dissolved in seawater and mixed in seawater as a suspension, like the movement of seawater particles, has Lagrangian properties. The fact that seawater particles migrate within the tidal sea is not only related to tidal currents (irrespective of the non-tidal current), which has attracted the attention of many researchers. It is well known that the shallow Stokes drift caused by the shallow water wave due to the shear rate change of the water quality point. According to exactly the same principle, the tidal current field shear rate will also lead to the water quality point in a tide cycle no longer return to the original place, resulting in Lagrange drift