海浜の平衡縦断面の相違による浮遊砂濃度の時空間分布に関する研究

抄録

Many researchers have gained key knowledge from existing quantitative measurements of the vertical profiles of suspended sediment concentration in coastal zones. Despite these advances, there still remains much to be solved concerning the distribution of the time and space-dependent concentrations of suspended sediment that accompanies wave-driven transport, as well as the way in which the distribution of suspended sediment concentration varies with the changes in the equilibrium beach profile. This study investigates variations in the temporal and spatial distributions of suspended sediment concentration that induce changes in the equilibrium beach profile. High concentrations of suspended sediment in beach profile Type I and Type II have been recorded in the zone of breaking waves in the ocean half-wavelength region between a bar and trough. The distinction in suspended sediment concentration between Types I and II is clear: suspended sediment concentrations are higher in Type I than in Type II throughout the observed region.