COMPARING BEACH MORPHOLOGICAL CHANGES BETWEEN GRAVEL AND SANDY COASTS

In recent years, the risk of coastal erosion during typhoons in Japan has been gradually increasing, and this could become even more pronounced in the future as projections show that 10-yr return wave heights could increase due to future tropical cyclone intensification (Shimura et al., 2014) and sea level rise (Udo et al., 2013). In the present work, the authors focus on short- term sediment transport caused by present-day typhoons and, given the narrow widths of many sandy coasts in Japan, even one typhoon may cause significant coastal erosion.