Analytical and experimental modellng of iceberg scours

TL;DRAbstract

The discovery of oil and gas in the iceberg infested waters off the coast of Newfoundland and Labrador has generated increased interest in icebergs. There is a need to find solutions to potential iceberg hazards in order to optimize the production schemes. This thesis is a continuation of the ongoing research on geotechnical aspects of iceberg scours. -- The earlier analytical model has been extended to incorporate the nonlinear velocity of the iceberg during scouring. This study examines the scouring potential of icebergs which roll due to instability, increase their draft, and penetrate the seabed before scouring. For a given iceberg, if such initial penetration depth is more than a certain upper bound, only a pockmark will be left on the seafloor. For the initial penetration depths smaller than a certain lower bound, the resulting maximum scour depth would be as if there were no initial penetration of the seafloor. -- The influence of keel shape on the maximum depth gouged by an ice

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