Open AccessMorfodinâmica de praias estuarinas de baixa energia durante dragagem de aprofundamento do canal da Galheta, Paranaguá – PR
Author(s) -
Silvio Roberto de Oliveira Filho,
Fabiane Bertoni Reis,
Guilherme Borges Fernández,
Carlos Serafim Santos,
Leonardo da Silva Lima,
Estefan Monteiro da Fonseca
Publication year - 2021
Publication title -
revista brasileira de geografia física
Language(s) - English
Resource type - Journals
ISSN - 1984-2295
DOI - 10.26848/rbgf.v14.4.p1924-1940
Subject(s) - humanities , physics , art
Estuarine beaches are generally classified as low-energy or sheltered due to the predominance of low waves and short periods, which favor the wave approach with large angles due to limited refraction, narrow beachface and narrow or nonexistent berm. The installation of ports in the interior of estuaries causes several negative effects, mainly due to the activities of dredging of navigation channels and secondly, due to the transit of vessels. The objective of the present work was to monitor four estuarine beaches, on the banks of the Paranaguá bay - PR, characterized as low energy beaches, with the purpose of following the short-term morphological and volumetric changes that occurred during a dredging of deepening in the Galheta navigation channel. For this purpose, cross-shore topographic surveys were carried out, before, during and after the dredging, between February 2017 and March 2019, at 10 monitoring sites. Among all the monitored sites, only the easternmost sites on the beaches of Amparo and Maciel show continuous erosion. The causes of this erosion may be related to tide currents associated with low altitudes of the beaches, storm surge events and dredging.