Journal
OCEAN ENGINEERING
Volume 247, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.oceaneng.2022.110687
Keywords
Underwater oil spill; Oil-sediment interaction; Oil-sediment aggregation; Numerical simulation; Environmental damage assessment
Funding
- National Natural Science Foundation of China [U2006210, 41806111]
- National Key Research and Development Plan [2016YFC1402304]
- Open Foundation of Key Laboratory of Marine Spill Oil Identification and Damage Assessment Technology
- State Oceanic Administration [201608]
- Scientific Research Foundation of Hebei Normal University of Science and Technology
- High Performance Computing Center at the Institute of Oceanology, Chinese Academy of Sciences
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The influence of oil-sediment interaction on the transport of underwater spilled oil is investigated through numerical experiments. The results show that interaction between oil and suspended sediment can form oil-sediment aggregates, which can decrease the amount of surface oil and increase the amount of underwater oil. Oil spill volume is identified as the most sensitive factor affecting oil-sediment interaction.
Based on a validated underwater oil spill model and validated ocean hydrodynamic background, the influence of oil-sediment interaction on the transport of underwater spilled oil is investigated through numerical experiments. Numerical result shows that interaction between oil and suspended sediment can form oil-sediment aggregates (OSAs), which can significantly decrease the amount of surface oil and increase the amount of underwater oil and its sweeping volume under certain conditions. Sensitivity of the model output (in terms of oil in OSAs, underwater oil amount, surface oil amount, and sweeping volume) to input factors (including oil spill volume, sediment diameter, and sediment concentration) is further investigated quantitatively through numerical experiments, which shows that increasing oil spill volume and sediment concentration and reducing sediment diameter can promote oil-sediment interaction. Among the three input factors, oil spill volume is the most sensitive factor, followed by sediment concentration and sediment diameter. This study is expected to provide useful information for spilled oil monitoring, contingency planning, and environmental damage assessment.
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