Abstract
To reduce scarp erosion due to runup waves, Cable tied blocks were proposed and their performances were studied in a water flume. The spectral analysis was employed to the dynamics response between incident waves and runup waves and the low frequency domain was prominent for runup waves. All the data of run up height with cable tied blocks were obviously smaller than that without them. The one-third runup height and the ratio of the number of runup waves to that of offshore incident waves may be estimated with surf similarty parmeter. The modified Boussinesq equation based on non-linear long wave equation and the continuous equation were applied to the onshore-offshore beach profile considering the exciting of cable tied blocks. The maximum runup height could be caluculated.
