Abstract
Two formulas of sand transport rate due to wave action are proposed. One is for the region of saltation and the other is for the sheet-flow motion. The former formula is derived by theoretical consideration in which stochastic characteristics of sand particles on the bed are taken account of. A good agreement between the experimental data and the theory is confirmed. In order to derive the latter one, a series of experiments was carried out in a U-shape tube. The 1.5 power relationship of transport rate and bottom shear stress is concluded empirically for the sheet-flow motion. The limit of application of both formulas is also discussed in the paper.