Experimental Investigation of the Hydraulic Performance of Breakwater Structures with Geotextile Armor Units
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 148, Issue 3
Abstract
Geotextile sand containers (GSCs) gained popularity recently as a modern age coastal protection measure. Its usability as an ecofriendly alternative for traditional breakwaters overcomes issues such as scarcity and quarrying prohibition of natural rocks. The current work involves a 1:30 scaled physical experimentation on the hydraulic performance of an emerged, nonovertopping breakwater model with GSCs. Four configurations of GSC structures are analyzed for their runup, rundown, and reflection characteristics confining to wave parameters of Mangaluru. The study revealed that the reflection coefficient (Kr) for GSC structures could range from 0.26 to 0.69. In addition, reducing GSC fill percentage from 100 to 80 is found to be more effective (up to 64%) in reducing reflection, runup, and rundown rates, than altering GSC size. These results can serve as a practical guideline for designing GSC breakwaters.
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Acknowledgments
The authors wish to express gratitude to the Director, NITK, Surathkal, Mangaluru, India, and Head, Department of Water Resource and Ocean Engineering for the opportunity to conduct the present research. Technical support of Khator Technical Textiles, Maharashtra, India, in supplying nonwoven geotextiles free of cost is duly acknowledged. Support extended by nonteaching staff and colleagues in conducting physical model tests is appreciated with gratitude.
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Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 148 • Issue 3 • May 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Aug 12, 2021
Accepted: Feb 1, 2022
Published online: Mar 16, 2022
Published in print: May 1, 2022
Discussion open until: Aug 16, 2022
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