Abstract
We experimentally investigated scouring mass of sediments by breaking wave action in a tidal river and in an experimental flume with a slope bed. Major conclusions of this study are as follows: (1) Impact of breaking wave acting on the slope is formularized by the conservation equation of momentum considering reflection; (2) The impact of breaking wave decreases as increase in wave steepness under the same wave height; (3) Cohesive sediments were scoured as piece and accumulated like marbles at the foot of the slope; (4) The mass of the sediments scoured by breaking waves, Ws, per number N of acting wave, and per unit area is formulated as (Wsg/As)/τs/N=m[(pm/τs)-(pm/τs)c], where pm and τs are the maximum impact of breaking wave and the shearing strength of the sediments, respectively. As a result of the experiments, m and (pm/τs)c are 0.14 and 037, respectively.
