Mosfoscopia e transporte sedimentar da linha de costa da planície costeira de Aquiraz, Ceará, Brasil.

Abstract

This study aimed to analyze the sediments o f Aquiraz Coastal beach strip, in order to identify bypass sectors, as well as verify the sections o f the beach that are still protected from Coastal processes by dune fields that are sediment supply of the beaches. The coast o f Aquiraz is located on the east coast of Ceará, with a length of approximately 30 km o f coastline. Such research was in its methodology fieldwork with collecting sediments in the three beach zones and in the fields of mobile dunes and sedimentological analysis in the laboratory. According to the data obtained in the morphoscopic analysis the sediments of dune environments on the beach of Iguape and Prainha respectively they were dull, about 66% and 77%, with an occurrence between 23% and 32% of sediment with brightness, therefore suggesting the presence of material before transported in aqueous environments. Already through beach sediments, more specifically, the shoreface zone, it was found that there is interaction between the wind and underwater transport environments due to the presence of approximately 41% and 37% sediment found inshoreface zone typical from dune areas. Given what has been exposed in the results it was verified that the conditions of retreat of the coast Une and reduced sediment supply discussed in this research are not only related to changes in sea levei, but especially with the evolution ofoccupation and Coastal dynamics ofthe area.