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A Case Study of Contaminant Transport Modelling: Tuzla Oil Spill

Kazezyılmaz,M.C., Güleç,Ş. B., Otay,E. N.

Proceedings of 1st International Conference on Oil Spills in the Mediterranean and Black Sea Regions

126-136, 1998

On February 13th, 1997, a tanker named TPAO exploded in Tuzla shipyards located on the northeastern coast of the Sea of Marmara. During the fire, an estimated amount of 215 tons of oil was spilled into the Aydınlık Bay. Based on field observations and computer simulations, the present paper investigates the water circulation and the distribution of contaminant concentrations in time steps following the accident. Two separate model grids are developed for the Sea of Marmara and the Aydınlık Bay to account for both the large scale effects of the water circulation and the local conditions determined by the physical boundaries. The simulation results for the distribution of surface currents and the fate of oil spill showed that the contamination mainly affected the immediate vicinity of the Aydınlık Bay. The shape of the bay and the local wind and current climate are found to be the key factors to limit contamination within the bay waters. Model runs for possible oil spill scenarios in the Sea of Marmara showed that the most critical point is located at the southern entrance of the Strait of Istanbul. At this location, strong coastal currents generated by the natural channel hydrodynamics, force the contaminant to take a shore parallel course either westerly or easterly depending on the wind induced circulation in the Sea of Marmara.

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