Field Experiment on Beach Nourishment Using Coarse Materials on Ninomiya Coast

Abstract

On the Ninomiya coast, two groins of 50 m length with an opening of 300 m were constructed as a measure preventing longshore discharge of nourishment sand, and then beach nourishment using 16,400 m³ of the riverbed materials of the Sakawa River were carried out by July 9, 2012. Storm waves of Typhoon No. 5 hit the coast on June 19, 2012 and 10,900 m³ of beach materials discharged by storm waves. The effect of beach nourishment using coarse materials on this coast was investigated by field observation along with the numerical simulation using the contour-line-change model.