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Fate of diluted bitumen spilled in the coastal waters of British Columbia, Canada

From National Research Council Canada

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DOIResolve DOI: https://doi.org/10.1016/j.marpolbul.2019.110691
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Affiliation
  1. National Research Council of Canada. Energy, Mining and Environment
FormatText, Article
Subjectdiluted bitumen; dilbit; oil; particles; Strait of Georgia; North coastal British Columbia
Abstract
There is public concern about the behaviour of spilled diluted bitumen (dilbit) in marine and estuarine waters. We provide a preliminary assessment of the results of laboratory experiments and models, in the context of environmental conditions in the coastal waters of British Columbia. Most dilbit spilled within this region would likely float at the surface and be transported to shore by winds and currents. Fresh dilbit is too light to sink in coastal waters. Highly weathered dilbit could sink where salinity is less than 14, typically only near river mouths and in the top 1–3 m of fjords after heavy rainfall. Subsurface plumes of weathered dilbit could re-emerge at the surface. Sinking oil-particle aggregates are unlikely to form in coastal waters. However, dilbit could be entrained below the surface by wave mixing during storms and to depths of 150 m by coherent mixing in the Haro Strait tidal convergence zone.
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PublisherElsevier
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  • Marine Pollution Bulletin 150, 110691: 1–13.
LanguageEnglish
Peer reviewedYes
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Record identifier4f50cdab-b72a-4572-a8b9-7a5ba536f2ae
Record created2020-06-25
Record modified2020-07-08
Date modified: