Morphosedimentary characteristics and morphological, sedimentary and
hydrodynamic patterns of many beaches of Pará North coastal have been studied by
many authors. But, studies about short period dynamics of these environments are
rare in the scientific literature. Thus, this work aims the verification of active,
dominant and/or present systems in Pescadores beach, as well the characterization
of the beach in a short period. Field trips were held for fifteen consecutive days
where topographic transects were made, along with collect of samples of surface
sediments. Topographic transects were made using an automatic level, in two
separated locations in an area sheltered from wave action, only with tidal influence,
and in a region exposed to wave and tidal actions. Sediment collect was made at low
tide line to be the region with the greatest fidelity to the processes occurring on site
such as action of flood and ebb currents, winds and tides. Results showed that in
general, the exposed transect presented itself an erosive region and the sheltered
transect presented itself a depositional region, noting that the major changes were
episodic in both profiles, as a result of climate oscillations. Results also demonstrate
the relevance of morphosedimentary variations in hours and days scale of on
beaches in Northern Brazil, as well as its dependence on the degree of exposure to
wind and waves.
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