Dragging activity and circulation of ocean water masses: possible influences on physicochemical characteristics on inner shelf adjacent to Guanabara Bay (RJ)

Authors

  • Fabiane Bertoni dos Reis Programa de Pós-Graduação em Dinâmica de Oceanos e Terra Instituto de Geociências, Universidade Federal Fluminense. Avenida Gen. Milton Tavares de Souza s/nº - Gragoatá – Campus Praia Vermelha – Niterói – Rio de Janeiro. Bolsista do Projeto – Secretaria Nacional de Portos.
  • Leonardo Lima Programa de Pós-Graduação em Dinâmica de Oceanos e Terra Instituto de Geociências, Universidade Federal Fluminense. Avenida Gen. Milton Tavares de Souza s/nº - Gragoatá – Campus Praia Vermelha – Niterói – Rio de Janeiro. Bolsista do Projeto – Secretaria Nacional de Portos.
  • Estefan Monteiro da Fonseca Programa de Pós-Graduação em Dinâmica de Oceanos e Terra Instituto de Geociências, Universidade Federal Fluminense. Avenida Gen. Milton Tavares de Souza s/nº - Gragoatá – Campus Praia Vermelha – Niterói – Rio de Janeiro.
  • André Belém Programa de Pós-Graduação em Dinâmica de Oceanos e Terra Instituto de Geociências, Universidade Federal Fluminense. Avenida Gen. Milton Tavares de Souza s/nº - Gragoatá – Campus Praia Vermelha – Niterói – Rio de Janeiro.

DOI:

https://doi.org/10.32360/acmar.v53iEspecial.42684

Abstract

Dragging activity is carried out in port regions for the deepening, widening and maintenance of free access to vessels, as well as for accident prevention and losses. But it also results in changes in hydrodynamics, in geophysical characteristics and eventually, changes in water and sediment geochemistry. Therefore, the present study aims at to characterize the water masses at the entrance of Guanabara Bay/RJ, Brazil, including the region’s disposal area for dredged material. This initial analysis will be a reference for further studies of how this activity may alter and/or enhance the circulation of water and the consequences. From historical data and using oceanographic analysis software Ocean Data View, it was possible to observe the natural seasonal variability of the area, raising questions that initiate this kind of analysis, as well as the identification of some negative and positive environmental impacts resulting from these correlations.


Keywords: dragging, SACW, Guanabara Bay.

Published

2021-01-19