Choi, J.G. and Cho, Y.J., 2023. Beach stabilization effect of an asymmetric ripple-shaped mat: A numerical study. In: Lee, J.L.; Lee, H.; Min, B.I.; Chang, J.-I.; Cho, G.T.; Yoon, J.-S., and Lee, J. (eds.), Multidisciplinary Approaches to Coastal and Marine Management. Journal of Coastal Research, Special Issue No. 116, pp. 628-632. Charlotte (North Carolina), ISSN 0749-0208.

Structures deployed for beach stabilization should be designed such that these structures would not alter the year-long grand circulation process of sandy beaches over the course of which temporarily eroded beaches by harsh waves in rough sea are gradually restored. Nonetheless, massive structures such as LCB (Low-Crested Breakwater) are frequently deployed in coastal zone maintenance project run by the Korean Ministry of Ocean and Fisheries to mitigate beach erosions. In this rationale, the Asymmetric Ripple-shaped Mat (ARM) proposed by Irie et al. (1994) can be a viable alternative for beach stabilization due to its small size compared to the commonly used but inefficient massive LCB. The effectiveness of ARM depends on how effectively the eddies generated at the ARM's apex trap sand moving offshore during the run-down process. To test this hypothesis, the author conducted numerical simulations. The numerical results demonstrate that ARM effectively captures sediment through vortex shedding from its apex and returns it to the beach, which is considered the primary mechanism for ARM's beach stabilization effect.