Bay Flooding through Tidal Inlet and by Wave Overtopping of Barrier Beach
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 143, Issue 5
Abstract
A simple analytical model for a small bay with a tidal inlet channel was developed to predict the peak still-water elevation in the bay for the specific peak still-water elevation and surge duration in the ocean. The model was applied to the Delaware Atlantic coast where three bay-tide gauges, together with one ocean-tide gauge, have been in operation since 2005. Twenty-seven storms identified between 2005 and 2015 were used to calibrate a dimensionless parameter related to inlet and bay characteristics. The calibrated model predicted the peak still-water elevation within 10% error at two bay gauges and within 30% error at the third bay gauge. Wave overtopping and overwash over the barrier beach between the ocean and bay occurred during Hurricane Sandy in 2012. Wave overtopping and barrier beach evolution were predicted using a cross-shore numerical model. The analytical model including wave overtopping predicted the peak still-water elevation increase of 0.1–0.2 m (10–20%) in the bay. The coupled approach is useful in evaluating bay-flooding risk for given storm statistics for the ocean.
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Acknowledgments
This study was supported by Delaware Sea Grant NOAA SG2016-18 R/OCE-9 and U.S. Army Corps of Engineers under Cooperative Agreement W912HZ-15-02-0028.
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Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 143 • Issue 5 • September 2017
Copyright
© 2017 American Society of Civil Engineers.
History
Received: Oct 25, 2016
Accepted: Feb 14, 2017
Published online: Jun 7, 2017
Published in print: Sep 1, 2017
Discussion open until: Nov 7, 2017
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