Author(s)

N. Allyn, M. Quick, E. Condon, E. Morris

Abstract

Solving a harbour sedimentation problem in Yemen N. Allyn', M. Quick', E. Condon', E. Morris' * Manager of Coastal Engineering, Westmar Consultants Inc., Canada. ^Professor Emeritus, University of British Columbia, Canada. ^Capital Management Specialist, Nexen Inc., Canada. * Coastal Engineer, Westmar Consultants Inc., Canada. Abstract The Ash Shihr, Yemen harbour on the Gulf of Aden was built in 1992/93 by Nexen Inc. for the vessel fleet supporting the loading of oil into large tankers at the offshore Single Buoy Mooring (SBM). In designing the harbour, the greatest emphasis was placed on ensuring that the harbour provided effective shelter during the SW summer monsoon season, which can generate deep water waves of up to about 6.4 m significant wave height with a period of 14 seconds. This led to the harbour entrance being placed on the east side of the harbour to minimize wave agitation within the harbour. The dominant factor proved to be the littoral drift of sediment in a wester

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