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在河口或邻近河口位于海岸的港池,一般皆发生泥沙淤积,因此,为保证港池的正常运行,需要维护疏浚。港池的泥沙淤积是由池内相对清的水与池外的混水相互交换而引起。这种水交换基本上可以取决于三种机理,即分别为进潮量、港池进口处的水平旋涡和异重流。一些实例证明,特别是后一种机理对港池内的淤积程度会有相当大的作用。
Sediment deposition usually takes place on the coast of the estuarine or adjacent estuaries. Therefore, in order to ensure the normal operation of the port, dredging needs to be maintained. Sedimentation in the harbor basin is caused by the exchange of relatively clear water in the pool with mixed water outside the pond. This water exchange can basically depend on three mechanisms, namely the tidal volume, the horizontal vortex at the inlet of the harbor basin, and the gravity flow. Some examples prove that especially the latter mechanism can have a considerable effect on the siltation in the harbor.