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Planar Installation Characteristics of Crown Depth-Variable Artificial Coral Reef on Improving Coastal Resilience: A 3D Large-Scale Experiment

1
Research Institute of Industrial Technology, Pusan National University, Busan 46241, Korea
2
Department of Civil and Environmental Engineering, Pusan National University, Busan 46241, Korea
3
Department of Civil and Urban Engineering, Inje University, Gimhae 50834, Korea
4
Experimental Station for Coastal Engineering, Directorate General of Water Resources, Ministry of Public Works and Housing, Bali 81155, Indonesia
*
Author to whom correspondence should be addressed.
Academic Editor: Diego Vicinanza
Water 2021, 13(11), 1526; https://doi.org/10.3390/w13111526
Received: 31 March 2021 / Revised: 25 May 2021 / Accepted: 25 May 2021 / Published: 28 May 2021
(This article belongs to the Section Oceans and Coastal Zones)
Coastal resilience has received significant attention for managing beach erosion issues. We introduced flexible artificial coral reef (ACR) structures to diminish coastal erosion, but planar installation effects should be considered to evaluate the feasibility of coastline maintenance. In this study, we conducted a three-dimensional large-scale experiment to investigate the characteristics of planar installation of ACR, focusing on the wave mitigation performance, wave profile deformation with delay, nearshore current movement, deposition and erosion trends, and beach profile variation. We found that the ACR diminished the wave height by ~50% and the current intensity by ~60% compared with that of a conventional submerged breakwater made of dolos units. Using the dispersion velocity of the dye in a tracer experiment, the dispersion time of the ACR was approximately 1.67-times longer than that of the dolos and the current velocity was reduced, revealing that ACR significantly reduced structural erosion. With dolos, severe erosion of >10 cm occurred behind the structure, whereas there was only slight erosion with the ACR. Moreover, in a vertical beach-profile analysis, the ACR exhibited greater shoreline accretion than that of dolos. These results indicate the potential of ACR in improving coastal resilience. View Full-Text
Keywords: artificial coral reef; coastal resilience; wave mitigation; nearshore current; topographical trend artificial coral reef; coastal resilience; wave mitigation; nearshore current; topographical trend
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MDPI and ACS Style

Hong, S.; Baek, S.; Kim, Y.; Lee, J.; Prasetyo, A.; Kim, W.; Kwon, S. Planar Installation Characteristics of Crown Depth-Variable Artificial Coral Reef on Improving Coastal Resilience: A 3D Large-Scale Experiment. Water 2021, 13, 1526. https://doi.org/10.3390/w13111526

AMA Style

Hong S, Baek S, Kim Y, Lee J, Prasetyo A, Kim W, Kwon S. Planar Installation Characteristics of Crown Depth-Variable Artificial Coral Reef on Improving Coastal Resilience: A 3D Large-Scale Experiment. Water. 2021; 13(11):1526. https://doi.org/10.3390/w13111526

Chicago/Turabian Style

Hong, Sunghoon, Seungil Baek, Yeonjoong Kim, Jooyong Lee, Adi Prasetyo, Wonkook Kim, and Soonchul Kwon. 2021. "Planar Installation Characteristics of Crown Depth-Variable Artificial Coral Reef on Improving Coastal Resilience: A 3D Large-Scale Experiment" Water 13, no. 11: 1526. https://doi.org/10.3390/w13111526

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