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Article Dans Une Revue Journal of Hazardous Materials Année : 2013

Recurrent arrival of oil to Galician coast: The final step of the Prestige deep oil spill

Résumé

Yearly monitoring in one of the most affected coastal zones by the Prestige oil spill, namely Nemiña and O Rostro beaches (NW Spain), has been carried out since 2004. Topographic data of beaches revealed seasonal altimetric changes up to 4 m that would prevent the on shore persistence of oil. However, surficial and subsurficial oil was detected in the intertidal area of both beaches in all campaigns. The hydrocarbon analysis confirmed that this oil corresponded to the Prestige oil, even nine years after the accident. Tar balls were highly biodegraded suggesting that the oil was accumulated on the subtidal sediments for a long time and transported to the coast by the action of waves. The present work provides new evidence of the long term persistence of deep oil spills from wrecks in marine areas where the hydrodynamic conditions play a twofold key role, in determining the exposed coastal area to recurrent contamination and in burying and resurfacing the oil in the intertidal zone.

Dates et versions

hal-01071707 , version 1 (06-10-2014)

Identifiants

Citer

A. M. Bernabeu, S. Fernandez-Fernandez, Frederic Bouchette, D. Rey, A. Arcos, et al.. Recurrent arrival of oil to Galician coast: The final step of the Prestige deep oil spill. Journal of Hazardous Materials, 2013, 250, pp.82-90. ⟨10.1016/j.jhazmat.2013.01.057⟩. ⟨hal-01071707⟩
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