Bayesian sunken oil tracking with SOSim v2: Inference from field and bathymetric data

• Published in: Marine pollution bulletin Vol. 165; p. 112092
• Main Authors: Jacketti, Mary, Englehardt, James D., Beegle-Krause, C.J.
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.04.2021; Elsevier BV
• Subjects: Bathymeters; Bathymetric data; Bathymetry; Bayes Theorem; Bayesian analysis; Bayesian inference; Coriolis effect; Damage assessment; Emergency preparedness; Emergency response; Gulf of Mexico; Hydrodynamics; Inference; Mathematical models; Oil; Oil pollution; Oil spill models; Oil spills; Petroleum Pollution; Pollutants; Probability theory; Sensitivity analysis; Simulators; SOSim; Sunken oil; Tracking; Gulf of Mexico; Sunken oil; Oil spill models; Bayesian inference; SOSim
• ISSN: 0025-326X; 1879-3363
• DOI: 10.1016/j.marpolbul.2021.112092

Sunken oil is often difficult to detect, and few oil spill models are designed to locate and track such oil. Therefore, the multi-modal Bayesian inferential sunken oil model, SOSim (Subsurface Oil Simulator), was expanded in this work for use during emergency response and damage assessment. Rather than requiring hydrodynamic data as input, SOSim v2 accepts available field concentration data, along with default or custom bathymetric data, for inference of the location and trajectory of sunken oil. Novel aspects include inference based on bathymetry and the Coriolis Effect, by constructing a prior likelihood function from sampled bathymetric data, scaled proportionally with field concentration data. SOSim v2 is demonstrated versus field data on the ITB DBL-152 oil spill in the Gulf of Mexico, with sensitivity analysis. Results suggest that the inferential approach presented can be effective for modeling relatively slow-moving pollutant masses such as sunken oil, when field concentration data are available. •SOSim (Subsurface Oil Simulator) is a multi-modal Bayesian sunken oil model.•SOSim was expanded to accept field concentration data and bathymetric data.•Results suggest that SOSim can be an effective model when field data are available.