Erosion Mitigation Using Submerged Breakwater Composed of Artificial Reefs

Abstract:

In this study, erosion mitigation by submerged breakwater with artificial reefs is investigated among other means of countermeasures. Beach erosion mechanism near the submerged breakwater and the performance of artificial reef blocks are analyzed in the laboratory. Two-dimensional and three-dimensional laboratory experiments are applied to the analysis. The results of two-dimensional experiments prove that new artifi-cial blocks showed a better performance than the existing blocks in terms of wave attenuation due to wave breaking turbulence near the crest of the structure. Three-dimensional experiments show reduced return flow velocity by half by installing another type of new artificial block in between submerged breakwaters. Return flow has been creating vulnerability in countermeasures by submerged breakwater. Therefore, artifi-cial reef blocks suggested by this study offer solutions to the existing mitigation problems with submerged breakwater.

• Periodical: Applied Mechanics and Materials (Volumes 744-746)
• Pages: 1171-1174
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.744-746.1171
• Online since: March 2015
• Authors: Kyu Han Kim*, Bum Shick Shin
• Keywords: Artificial Reef, Erosion, Hydraulic Model Test, Rip Current, Submerged Breakwater

References

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[5] Kim, K.H., Shin, S.W., Pyun, C. -K., Kim, H.D., and Kobayashi, N. : Beach Erosion Countermeasure using New Artificial Reef Blocks, Proceedings 33rd International Conference on Coastal Engineering(2012).

DOI: 10.9753/icce.v33.sediment.107

[6] Kim, K. H., Shin, S. W., Widayati, A. Y. W. : Mitigation Measures for Beach Erosion and Rip Current, Journal of Coastal Research, Special Issue No. 65(2013), pp.290-295.

DOI: 10.2112/si65-050.1