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TIDE-INDUCED MASS TRANSPORT; A FLUSHING MECHANISM FOR SHALLOW LAGOONS

Author(s): J. Van De Kreeke

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Abstract: Based on the one-dimensional long wave equations a discussion of the physics underlying the tide-induced mass transport in lagoons is presented. It follows from the dynamic equation that the bottom stress associated with the mass transport serves to balance the gradient of the radiation stress and the net bottom stress associated with the (tidal) waves. The mass transport is at best of 0(a/h) (a = tidal amplitude, h = depth). It is shown that inlets can play an important role in the mass transport and that by properly selecting the inlet dimensions that mass transport can be considerably increased. Numerically computed values show that the tide-induced mass transport can be an important mechanism in renewing the waters of shallow lagoons.

DOI: https://doi.org/10.1080/00221687609499688

Year: 1976

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