Numerical Simulation of Diffusion of Nourishment Sand Offshore of South Kujukuri Beach and Effect of Continuous Beach Nourishment

Abstract

Sand movement in the field experiment of beach nourishment offshore of south Kujukuri Beach was numerically simulated using the BG model, given the wave field predicted by an angular spreading method of irregular waves on the basis of wave data measured at Choshi. The effectiveness of the model was confirmed, and then numerical simulation of the recovering effect of sandy beach in full-scale beach nourishment was carried out under the conditions that the artificial headlands have the present shapes, they are half and fully extended. It is found that although the best one is the shape fully extended, significant effect can be expected in artificial headland with a half length.