抄録
Rubble mound breakwater is permeable to wave, current and sediment sand. In order to reduce inflow of sediment sand through a rubble mound breakwater, impermeable countermeasures such as sheet piles etc. have been occasionally constructed behind the breakwater inside harbors at thermal or nuclear power plant sites. For evaluation on the workability of such countermeasures against transmitted sediment sand, it is necessary to elucidate transmission mechanism of sand sediment through rubble mound breakwater. In this paper, at first, characteristics of overtopping and transmitted sediment sand through rubble mound breakwater caused by waves, is investigated in detail experimentally. Based on experimental results, rates of overtopping and transmitted sediment sand are modeled. Next, these sediment models are introduced into 3-D beach deformation numerical model. This new numerical model is applied to a field area of the sea around the harbor at the Higashidori nuclear power plant site and verified by field data.
