IJG  Vol.4 No.2 , March 2013
Modeling an Oil Spill along the Southern Brazilian Shelf: Forcing Characterization and Its Influence on the Oil Fate
ABSTRACT

Oil spills can generate multiple effects in different time scales on the marine ecosystem. The numerical modeling of these processes is an important tool with low computational cost which provides a powerful appliance to environmental agencies regarding the risk management. In this way, the objective of this work is to evaluate the influence of a number of physical forcing acting over a hypothetical oil spill along the Southern Brazilian Shelf. The numerical simulation was carried out using the ECOS model (Easy Coupling Oil System), an oil spill model developed at the Universidade Federal do Rio Grande—FURG, coupled with the tridimensional hydrodynamic model TELEMAC3D (EDF, France). The hydrodynamic model provides the current velocity, salinity and temperature fields used by the oil spill model to evaluate the behavior and the fate of the spilled oil. The results suggest that the local wind influence is the main forcing driven the fate of the spilled oil, and this forcing responds for more than 60% of the oil slick variability. The direction and intensity of the costal currents control between 20% and 40% of the oil variability, and the currents are important controlling the behavior and the tridimensional transportation of the oil. On the other hand, the turbulent diffusion is important for the horizontal drift of the oil. The weathering results indicate 40% of evaporation and 80% of emulsification, and the combination of these processes leads an increasing of the oil density around, 53.4 kg/m3 after 5 days of simulation.


Cite this paper
C. Stringari, W. Marques, R. Eidt and L. Mello, "Modeling an Oil Spill along the Southern Brazilian Shelf: Forcing Characterization and Its Influence on the Oil Fate," International Journal of Geosciences, Vol. 4 No. 2, 2013, pp. 397-407. doi: 10.4236/ijg.2013.42038.
References
[1]   K. A. Burns, S. Garrity, D. Jorissen, J. Macpherson, M. Stoelting, J. Tierney and L. Y. Simmons, “The Galeta Oil Spill ii. Unexpected Persistence of Oil Trapped in Mangrove Sediments Morlaix Twenty Years after the Amoco Cadiz Oil Spill,” Estuarine, Coastal and Shelf Research, Vol. 38, No. 4, 1994, pp. 349-364. doi:10.1006/ecss.1994.1025

[2]   R. B. Clark, “Marine Pollution,” Oxford University Press, Oxford, 2001.

[3]   R. Fernandes, “Modelacao de Derrames de Hidrocar-bonetos. Dissertcao de Mestrado,” Instituto Superior Técnico—Universidade de Lisboa, 2001.

[4]   R. C. Pereira and A. Soares-Gomes, “Biologia Marinha,” Inferência, Rio de janeiro, 2002, pp. 318-319.

[5]   J. M. Hervouet, “Free Surface Flows: Modelling with Finite Element Methods,” John Wiley & Sons, Hoboken, 2007.

[6]   W. C. Marques, E. Fernandes, I. Monteiro and O. O. Moller, “Numerical Modeling of the Patos Lagoon Coastal Plume, Brazil,” Continental Shelf Research, Vol. 29, No. 3, 2000, pp. 556-571. doi:10.1016/j.csr.2008.09.022

[7]   W. C. Marques, E. Fernandes and O. O. Moller, “Straining and Advection Contributions to the Mixing Process of the Patos Lagoon Coastal Plume, Brazil,” Journal of Geophysical Research, Vol. 115, No. C6, 2010, pp. 1-23. doi:10.1029/2009JC005653

[8]   W. C. Marques, E. Fernandes and A. Malcherek, “Dynamics of the Patos Lagoon Coastal Plume and Its Contribution to the Deposition Pattern of the Southern Brazilian Inner Shelf,” Journal of Geophysical Research, Vol. 115, No. C10, 2010, pp. 1-22. doi:10.1029/2010JC006190

[9]   W. C. Marques, E. Fernandes, A. L. A. O. Rocha and A. Malcherek, “Energy Converting Structures in the Southern Brazilian Shelf: Energy Conversion and Its Influence on the Hydrodynamic and Morphodynamic Processes,” Sciences, Vol. 1, No. 1, 2012, pp. 61-85.

[10]   M. Bollmann, “World Ocean Review,” Maribus, 2010.

[11]   D. P. French-Mccay, “Oil Spill Impact Modeling: Development and Validation,” Environmental Toxicology and Chemistry, Vol. 23, No. 10, 2004, pp. 2441-2456.

[12]   X. Chao, N. J. Shankar and H. F. Cheong, “Two- and Three-Dimensional Oil Spill Model for Coastal Waters,” Ocean Engineering, Vol. 28, No. 12, 2001, pp. 1557-1573. doi:10.1016/S0029-8018(01)00027-0

[13]   A. H. Al-Rabeh, H. M. Cekirge and N. Gunay, “A Stochastic Simulation Model of Oil Spill Fate and Transport,” Applied Mathematical Modelling, Vol. 13, No. 6, 1989, pp. 322-329. doi:10.1016/0307-904X(89)90134-0

[14]   P. Leitao, “Modelo de Dispersao Lagrangeano Tridimensional—Dissertacao de Mestrado,” Universidade Técnica de Lisboa, Lisboa, 1996.

[15]   R. Proctor, R. A. Flather and A. J. Elliot, “Modelling Tides and Surface Drift in the Arabian Gulf—Application to the Gulf Oil Spill,” Continental Shelf Research, Vol. 14, No. 5, 1994, pp. 531-545. doi:10.1016/0278-4343(94)90102-3

[16]   M. Fingas, “The Evaporation of Oil Spills: Development and Implementation of New Prediction Methodology,” Marine Environmental Modelling Seminar, Vol. 98, Lille-hammer, Norway, 1998.

[17]   W. Stiver and D. Mackay, “Evaporation Rate of Spills of Hydrocarbons and Petroleum Mixtures,” Environmental Science and Technology, Vol. 18, No. 11, 1984, pp. 834-840. doi:10.1021/es00129a006

[18]   D. Mackay, I. A. Buistt, R. Mascarenhas and S. Paterson, “Oil Spill Processes and Models,” Environment Canada, Ottawa, 1980.

[19]   I. Buchanan and N. Hurford, “Methods for Predicting the Physical Changes in Oil Spilt at Sea,” Oil & Chemical Pollution, Vol. 4, No. 4, 1988, pp. 311-328. doi:10.1016/S0269-8579(88)80004-2

[20]   L. F. Mello, C. E. Stringari, R. T. Eidt and W. C. Marques, “Desenvolvimento de Modelo Lagrangiano de Transporte de óleo: Estruturacao e Acoplamento ao Modelo Hidrodinamico TELEMAC3D,” Pesquisas Aplicadas em Modelagem Matemática, Vol. 1, No. 1, 2012, pp. 1-21.

[21]   J. A. Fay, “The Spread of Oil Slicks on a Calm Sea,” In: D. P. Hoult, Ed., Oil on the Sea, Plenum Press, New York, 1969, pp. 53-63.

[22]   C. E. Stringari, L. F. Mello, R. T. Eidt and W. C. Marques, “Estudo Numérico Lagrangiano Para Derrames de óleo na Regiao Oceanica Adjacente ao Porto de Rio Grande—RS,” Conferência Internacional em Tecnologias Naval e Offshore: Ciência e Inovacao, Rio Grande, 2012, p. 4.

[23]   H. Wang and C. P. Huang, “The Effect of Turbulence on Oil Emulsification,” Workshop on Physical Behavior of Oil in the Marine Environment, 1979.

[24]   NOAA, “ADIOS (Automated Data Inquiry for Oil Spills) Version 2.0,” Hazardous Materials Response and Assessment Division, NOAA, The US Coast Guard Research and Development Center, Seattle, 2000.

 
 
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