Sensitivity of modeled oil fate and exposure from a subsea blowout to oil droplet sizes, depth, dispersant use, and degradation rates.

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ID: 13943
2019
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Abstract
As part of a Comparative Risk Assessment (CRA) developed and reported previously, oil spill modeling of a hypothetical blowout at 1400 m in the northeastern Gulf of Mexico was performed to evaluate changes in oil exposures with alternative response options, i.e., combinations of mechanical recovery, in-situ burning, surface dispersant application and subsea dispersant injection (SSDI). To assess if conclusions from this study could be extended to other spill scenarios, sensitivities of the predicted oil fate and exposure metrics to location, release depth, oil and gas flow rate, gas content, orifice size, oil droplet size distribution, and biodegradation rates were examined. Results show that the fraction of oil surfacing is highly sensitive to oil droplet size distribution and depth of release. Across the simulations performed, SSDI use reduced oil droplet sizes released, thereby mitigating surface and shoreline oiling, volatile hydrocarbon exposures, and potential surface water column exposures.
Reference Key
frenchmccay2019sensitivitymarine Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors French-McCay, Deborah;Crowley, Deborah;McStay, Lisa;
Journal Marine pollution bulletin
Year 2019
DOI
S0025-326X(19)30569-7
URL
Keywords Keywords not found

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