U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, 600 4th Street South, Saint Petersburg, FL 33704, United States.
U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, 600 4th Street South, Saint Petersburg, FL 33704, United States.
Mar Pollut Bull. 2014 Mar 15;80(1-2):200-9. doi: 10.1016/j.marpolbul.2014.01.004. Epub 2014 Feb 6.
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 3years 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 "surface residual balls" (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.
在深水地平线石油泄漏事件发生后，在冲浪区形成的重于水的沙和油聚集体，在最初搁浅 3 年后仍继续导致海滩重新受到油污污染。为了了解这一现象，并为现在和未来的溢油事件提供操作响应信息，开发了一种评估这些“表面残余球”（SRB）的移动性和沿岸移动的数值方法，并将其应用于阿拉巴马州和佛罗里达州西部海岸。沿岸流和 SRB 的移动性以及潜在通量用于识别可能的输运和沉积模式。结果表明，在典型的平静条件下，厘米大小的 SRB 不太可能沿岸边移动，而在风暴期间则可能发生移动和输运。与 SRB 相比，沙子的更大移动性使得 SRB 很可能被掩埋和暴露，并且入口被确定为可能的 SRB 陷阱。现场数据的分析支持了这些模型结果。
