Аннотация:`Moving Gravel Body' method was developed, in which beach nourishment using beach material coarser than the original grain size of the beach is carried out as a measure against downcoast erosion on a coast with a predominant longshore sand transport. Numerical simulations using the contour-line-change model considering grain size changes were carried out. The effectiveness of the method was shown in comparison with the beach nourishment using fine sand and the installation of concrete blocks.
