Tidal Sandbanks in Mar Chiquita Coastal Lagoon, Argentina

Authors

  • Nestor W. Lanfredi
  • Carlos F. Balestrini
  • Carlos A. Mazio
  • Sergio A. Schmidt

Keywords:

Coastal lagoon, tidal inlet, tidal currents, sediment dynamics, tidal sandbanks, bank formation, power spectra, depth closure

Abstract

Tides and tidal currents were measured continuously over the tidal inlet and coastal lagoon of Mar Chiquita, southeastern Argentina. The oceanic tides present semidiurnal characteristics, predominantly the M2 component. Pronounced asymmetries observed inside the lagoon respond to contributions from superior harmonics. The friction terms of this dispersive medium play an important role in the translation of tidal waves. Considering the combined effects of wave agitation and net transport by tidal currents, it is inferred that a mechanism may exist between the outer bank and the tidal inlet to which it supplies sand. During the 12 day field study it was observed that strong storms can construct a major bank in a matter of hours.

 

 

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Published

1987-10-24

Issue

Vol. 3 No. 4 (1987): Journal of Coastal Research

Section

Articles

License

Authorization for personal use is granted by the Coastal Education and Research Foundation [CERF]. By submitting a manuscript, the authors agree that the copyright for their article is transferred to the publisher if the article is accepted for publication. Assignment of copyright is not required, however, from authors who work for organizations which do not permit such assignment, The copyright covers the exclusive rights to reprduce and distribute the article, inclduing reprints, photographic reproductions, microform, or any other reproductions of a similar nature, and translations.