Modelling the Effects of Chemical Dispersant on the Fate of Spilled Oil: Case Study of a Hypothetical Spill near Saint John, NB

Authors

  • Haibo Niu Department of Engineering, Faculty of Agriculture, Dalhousie University, B2N 5E3, Truro, NS, Canada
  • Rujun Yang Department of Engineering, Faculty of Agriculture, Dalhousie University, B2N 5E3, Truro, NS, Canada
  • Yongsheng Wu Fisheries and Oceans Canada, Bedford Institute of Oceanography, B2Y 4A2, Dartmouth, NS, Canada
  • Kenneth Lee Wealth from Oceans National Research Flagship, CSIRO, Kensington, WA, 6151, Australia

Abstract

The proposed Energy East pipeline project has raised concerns about potential oil spills in Saint John, New Brunswick, due to increased tanker traffic. While environmental conditions such as strong tide and current could pose challenges for using mechanical recovery methods if a spill occurs in the area, chemical dispersant could be an alternative oil spill countermeasure. However, the application of chemical dispersant in shallow water and costal zones remains an issue of debate. To study if chemical dispersant could be effective for potential oil spills in Saint John, a 3-dimensional model was used to simulate the transport of oil following a hypothetical release of 1000 m3 Arabian Light crude under winter conditions. A stochastic approach was used to take into account the uncertainties of environmental inputs. The results show a significant reduction of oil ashore, and enhanced biodegradation with dispersant application, but these effects were accompanied by an increase of oil in sediment and water column, which is a concern. While the results are only conclusive for the selected scenarios of winter release, the method could be extended to other months and seasons of the year to support more detailed net environmental benefit analysis regarding dispersant application.

Author Biography

Haibo Niu, Department of Engineering, Faculty of Agriculture, Dalhousie University, B2N 5E3, Truro, NS, Canada

Assistant Professor

Primary: Department of Engineering, Faculty of Agriculture

Cross-appointment: Department of Oceanography, Faculty of Science

Department of PEAS, Faculty of Engineering

 

References

Aamo O.M. Reed M. and Downing K. (1997). Oil spill contingency and response (OSCAR) model system: sensitivity studies. Proc 1997 International Oil Spill Conference.

Amante C. and Eakins B.W. (2009). ETOPO1 1 Arc-Minute Global Relief Model: Procedures, Data Sources and Analysis. NOAA Technical Memorandum NESDIS NGDC-24. National Geophysical Data Center, NOAA.

Arctic Oil Spill Response Technology Joint Industry Programme. (2013). Dispersant Use in Ice-Infected Waters: Status of Regulations and Outreach Opportunities. Final Report 2.8.

Blondina G.J., Singer M.M., Lee I., Ouano M.T., Hodgins M., Tjeerdema R.S. and Sowby M.L. (1999). Influence of salinity on petroleum accommodation by dispersants. Spill Science & Technology Bulletin, 5(2): 127-134.

Canadian Association of Petroleum Producers. (2013). About Canada’s Oil Sands. Report by Canadian Association of Petroleum Producers, Ottawa, ON.

Chen C., Huang H., Beardsley R.C., Liu H., Xu Q. and Cowles G. (2007). A finite volume numerical approach for coastal ocean circulation studies: comparisons with finite difference models. Journal of Geophysical Research, 112: C03018.

Conference Board of Canada. (2012). Fuel for Thought: The Economic Benefits of Oil Sands Investment for Canada’s Regions. Report by Conference Board of Canada, Ottawa, ON.

Environment Canada. (2014). Climate. Website: http://climate.weather.gc.ca/, visited 30 June, 2014.

Franklin C.L. and Warner L.J. (2011). Fighting chemicals with chemicals: the role and regulations of dispersants in oil spill response. Natural Resources & Environment, 26(2), 1-7.

Fuller C., Bonner J., Page C., Ernest A., McDonald T. and McDonald S. (2009). Comparative toxicity of oil, dispersant, and oil plus dispersant to several marine species. Environmental Toxicology and Chemistry, 23(120: 2941-2949.

Hemmer M., Barron M.G. and Greene R.M. (2011). Comparative Acute Toxicity of Eight Oil Spill Dispersants, Louisiana Crude Oil and Chemically Dispersed Oil to Two Gulf of Mexico Aquatic Species. Pro. 2011 International Oil Spill Conference.

International Energy Agency. (2012). Oil Market Report - June 2012. International Energy Agency, Paris.

Karsten R.H., McMillan J.M., Lickley M.J. and Haynes R.D. (2008). Assessment of tidal current energy in the Minas Passage, Bay of Fundy. Proc. IMechE, Part A: J. Power and Energy, 222: 493-507.

National Research Council. (2005). Oil Spill Dispersants: Efficacy and Effects. The National Academies Press, Washington, DC.

Nuka Research Planning Group. (2006). Response Gasp Methods. Report prepared for Prince William Sound RCAC.

Reed M., Aamo O.M. and Daling P. (1995). OSCAR: a model system for quantitative analysis of oil spill response strategies. Proc. 1995 AMOP Technical Seminar on Environmental Contamination and Response, 815-835.

Reed M., Aamo O.M. and Downing K. (1996). Calibration and testing of IKU’s oil spill contingency and response (OSCAR) model. Proc. 19th AMOP Technical Seminar on Environmental Contamination and Response, 689-726.

Reed M., Daling P., Lewis A., Ditlevsen M.K., Brors B., Clark J. and Aurand D. (2004). Modelling of dispersant application to oil spills in shallow coastal waters. Environmental Modelling & Software, 19: 681-690.

Reed M., Daling P. Singsaas I., Brakstad O.G., Faksnes L.G., Hetland B. and Ekrol N. (2000). OSCAR 2000: a multi-component 3-dimensional oil spill contingency and response model. Proc. 23rd AMOP Technical Seminar on Environmental Contamination and Response, 663-680.

Reed M., Ekrol N., Rye H. and Turner L. (1999). Oil spill contingency and response (OSCAR) analysis in support environmental impact assessment offshore Namibia. Spill Science and Technology Bulletin, 5(1): 29-38.

Swannell R.P.J. and Daniel F. (1999). Effect of dispersants on oil biodegradation under simulated marine conditions. Proc of the 1999 International Oil Spill Conference, Seattle WA, USA. American Petroleum Institute, Washington DC.

The Federal Interagency Solutions Group. (2010). Oil Budget Calculator-Deepwater Horizon. Report by The Federal Interagency Solutions Group, Oil Budget Calculator Science and Emerging Team.

US Environmental Protection Agency. (1999). Understanding Oil Spills and Oil Spill Response. Report EPA 540-K-99-007, US Environmental Protection Agency.

WSP Canada Inc. (2014). Risk Assessment of Marine Spills in Canadian Waters, Phase 1: Oil Spills South of the 60th Parallel. Report Number: WSP 131-17593-00. Prepared for Transport Canada.

Wu Y., Chaffey J., Greenberg D.A., Colbo K. and Smith P.C. (2011). Tidally-induced sediment transport patterns in the upper Bay of Fundy: a numerical study. Continental Shelf Research, 31(19-20):2041-2053.

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Published

2014-08-04