ABSTRACT

Lee, H.Y. and Suh, S.W., 2016. Application of EurOtop to improve simulations of coastal inundations due to wave overtopping. In: Vila-Concejo, A.; Bruce, E.; Kennedy, D.M., and McCarroll, R.J. (eds.), Proceedings of the 14th International Coastal Symposium (Sydney, Australia). Journal of Coastal Research, Special Issue, No. 75, pp. 1377 - 1381. Coconut Creek (Florida), ISSN 0749-0208.

To simulate wave-induced overtopping on coastal dikes, a method has been proposed by incorporating the empirical formulas of EurOtop into the storm surge model ADCIRC+SWAN. This approach was found to be efficient and reasonably acceptable through the model validation and sensitivity tests performed on an idealized basin using a hypothetical storm onslaught even under the assumption of a gradually varied flow for a small value of overtopped volume. The hindcasting inundation simulation results on a real case at the Busan coast, Korea, during the typhoon Maemi in 2003 showed quite a similar pattern of inundation area compared with the watermark investigations. This approach could simulate overtopping and overland flow with only a 3% additional computation time of the storm surge model for small parallel clusters of 64 cores. Moreover, it can address various dike types, surface armoring conditions, and rapidly varying ambient wave characteristics of height, period, and incident angle with sea-level change. Thus, we can conclude that it can be applied in real-time forecasting even on artificial coasts to minimize coastal inundation hazards and vulnerability.

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