Abstract
The fundamental process of contaminated pile formation by depositing drill cuttings into the sea is discussed. A new mathematical model of these processes is developed and tested against small-scale laboratory experiments. The experimental study shows how the piles are formed by the development of a particle-laden plume descending to the sea flow which spreads laterally, over a considerable distance, as a particle-driven gravity current. The model predictions are applied to interpret published field data measurements. These results show that the thickness of drill cuttings piles decreases rapidly with distance from the initial source of cuttings and, that when natural biodegradation occurs, only a smaller fraction of the pile area or mass requires treatment.
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