Remaining Capacity of Low-Crested Rubble Mounds Damaged by Breaking Waves in Surf Zone
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 148, Issue 6
Abstract
The rehabilitation timing of a damaged rubble mound structure depends on the remaining capacity of the deteriorated structure. A laboratory experiment was conducted in a wave flume to measure the remaining capacity of a low-crested rubble mound inside the surf zone on a sand beach. The formation of a bar and trough feature modified wave conditions at the toe of the structure. Wave transmission over and through the structure increased with lowering of the mound crest. The mound with a double armor layer on smaller core stones was exposed to irregular wave action lasting 22.2 h. Some of the core stone was visible through holes of the thinned armor layer but remained in place. Crest lowering reduced the wave action on the damaged mound. On the other hand, the mound with a single armor layer did not stabilize itself because of core stone removal after 7.8 h. The rubble mound structure was resilient as long as the core stone was protected.
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Acknowledgments
This study was supported by the US Coastal Research Program under Agreement No. W912HZ-20-2-0016.
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Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 148 • Issue 6 • November 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Apr 4, 2022
Accepted: Jul 21, 2022
Published online: Sep 7, 2022
Published in print: Nov 1, 2022
Discussion open until: Feb 7, 2023
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