Oil spill modelling with PETROMAR
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Abstract
Petromar version 1.2 was conceived as a deterministic model to predict oil slick trajectories on deep ocean and offshore, with possibilities to include more complex basins of Cuban insular shelf. Programming was 80 per cent done by authors, and by means of the BatTri subroutine it was designed twelve regional zones whose initial information was obtained from GEBCO project. The model employs a Lagrangian approach to simulate physical processes that occur inside the oil slick, as spreading, advection, diffusion and shore interaction, taking into account the procedures established in the international arena. It was used the finite element scheme for numerical modelling, which is distinguished by offering operational advantages and high efficiency in calculations. Among its benefits, the application allows the analysis of any oceanographic and meteorological variables, including the interaction between them; for example, combining the analysis of wave height with oil concentration may ease the choice of response technique to mitigate the impact of the spill. The modelling results are represented graphically in three forms and, simultaneously, the progression of each particle and the mass centre can be saved in numerical files. Results validation was made against NOAA drifters, and the error analysis showed an effectiveness of 92.4 %, which is considered as acceptable.
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