Estuaries, the confluence zones between river and sea, show a complex dynamic behavior.Saltwater intrusion can lead to a more or less well-defined salt wedge with associated with density current.

• 摘要河口位于河与海交界之通道，具有复杂的动力特性，盐分入侵可以导致或多或少的盐楔并伴随著密度流。