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Geological Society, London, Special Publications; 2007; v. 276; p. 329-342;
DOI: 10.1144/GSL.SP.2007.276.01.16
© 2007 Geological Society of London

Hydrodynamic modelling of bottom currents and sediment transport in the Canyon São Tomé (Brazil)

José A. M. Lima1, Osmar O. Moller, Jr2, Adriano R. Viana3 & Rafael Piovesan2

1 Petróleo Brasileiro S.A., Petrobras, Research Center, CENPES, Rio de Janeiro, RJ, 21.941-598, Brazil (e-mail: jlima{at}petrobras.com.br)
2 Departamento de Física, Fundação Universidade do Rio Grande—FURG, Av. Italia Km 8, Mail Box 474, Rio Grande, RS, 96201-900, Brazil
3 Petróleo Brasileiro S.A., Petrobras, E&P-Exploration, 65, Chile Av., Rio de Janeiro, RJ, 20031-912, Brazil

This study presents the hydrodynamic modelling of ocean currents along the Canyon São Tomé, Campos Basin, Brazil, and their impact on sediment transport. The objective is to develop a tool to simulate the interaction between bottom currents and the submarine physiography, and to depict the relative importance of any individual current forcing mechanism as a sediment-reworking agent. This paper presents the evolution of along-channel currents over a tidal cycle and the simulation of a turbidity current. The resultant sediment transport under the combination of turbidity and oceanic currents is also simulated. This model is a step forward towards the understanding of the geometric and textural modifications imposed by bottom currents upon gravity-driven deposits, which is of great importance for the oil industry.





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