A dynamic boundary layer model with simultaneous interactions between constant, oscillatory, and turbulent flow; suspended sediments; and erosion is developed. The model appears to be verified as well as the existing data permits. In purely oscillatory flow most of the state variables appear to be associated with a turbulent kinetic energy maximum developing near the bottom and phase angle &pgr;/2 and propagating upward thereafter. The maximum horizontal sediment flux is approximately proportional to the third power of the maximum turbulent stress. A channel flow with constant pressure gradient may be strongly reduced by the presence of waves. The waves may also increase the suspended sediment concentration significantly.