Erosion at Bend of Gravel Causeway Due to Waves
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 114, Issue 3
Abstract
A numerical two‐line model is developed to predict the erosion at the bend of a curved gravel causeway caused by the offshore and longshore gravel transport inside the breaker line on the side slope of the causeway. The two‐line model is based on a simplified erosion profile characterized by the landward displacement of the shoreline due to erosion and the seaward displacement of the breaker line due to deposition. The variations of the shoreline and breaker‐line displacements with time along the curved causeway are computed numerically using the continuity equations of sediment for the eroded and deposited regions on the side slope. Longshore and offshore gravel transport rates are estimated by modifying empirical formulas for straight sand beaches. The developed model is compared with the observed erosion at the West Dock Causeway in the southern Beaufort Sea north of Alaska. The calibrated numerical model is shown to explain the observed erosion well, although more detailed data are required to evaluate the model more rigorously.
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Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 114 • Issue 3 • May 1988
Pages: 297 - 314
Copyright
Copyright © 1988 ASCE.
History
Published online: May 1, 1988
Published in print: May 1988
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