Assessing mobility and redistribution patterns of sand and oil agglomerates in the surf zone

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• 作者：P. Soupy Dalyander ; ^{sdalyander@usgs.gov" class="auth_mail} ; Joseph W. Long ; Nathaniel G. Plant ; David M. Thompson
• 关键词：Gulf of Mexico ; Tarballs ; Surface residual balls ; Oil spill ; Surf zone ; Deepwater Horizon
• 刊名：Marine Pollution Bulletin
• 出版年：15 March, 2014
• 年：2014
• 卷：80
• 期：1-2
• 页码：200-209
• 全文大小：2118 K

文摘

Heavier-than-water sand and oil agglomerates that formed in the surf zone following the Deepwater Horizon oil spill continued to cause beach re-oiling 3 years after initial stranding. To understand this phenomena and inform operational response now and for future spills, a numerical method to assess the mobility and alongshore movement of these 鈥渟urface residual balls鈥?(SRBs) was developed and applied to the Alabama and western Florida coasts. Alongshore flow and SRB mobility and potential flux were used to identify likely patterns of transport and deposition. Results indicate that under typical calm conditions, cm-size SRBs are unlikely to move alongshore, whereas mobility and transport is likely during storms. The greater mobility of sand compared to SRBs makes burial and exhumation of SRBs likely, and inlets were identified as probable SRB traps. Analysis of field data supports these model results.