Prediction of Nourishment Material Composed of Mixed Grain Size in Foreshore Nourishment

Abstract

On the Hamamatsu-shinohara coast facing the Pacific Ocean, beach has been severely eroded, resulting in the shoreline recession of 210 m between 1962 and 2004. As a measure against beach erosion, beach nourishment using the mixture of sand and gravel was begun in 2005. Since then, 3.5×105m3 of sediment was supplied to the coast. In this study, we proposed a model for predicting the movement of gravel by waves. The predicted and measured results were in good agreement.