2018 Volume 74 Issue 2 Pages I_79-I_84
This study carried out laboratory experiments to investigate characteristics of the water surface fluctuation on the reef and to clarify how such water fluctuation on the reef affects the spatial distribution of the maximum runup height on the shore frtonted by a fringing reef. In the experiment, image-based analysis was applied to capture the spatio-temporal distributions of water level and shoreline location. Spectral analysis was performed on the obtained spatio-temporal fluctuations of the water level and on the time-varying shoreline profile. This result showed the clear evidence of the resonance not only in the cross-shore direction but also in the alongshore direction. The resulting long wave fluctuation, including the resonance, also showed strong correlation with the observed peak runup heights.