Vertical profiles of fluid velocity and suspended sediment concentration in nearshore

Based on the power function of velocity and the friction velocity, a velocity profile is obtained. By solving the Schmidt's diffusion equation, an equilibrium suspended sediment concentration profile is further deduced. The profiles of velocity and suspended sediment concentration agree well with the field data, and the profile of suspended sediment concentration avoids the unreasonableness of the classical Rouse profile such as a zero value at the water surface. According to these profiles, an expression which is easy to use for calculating the suspended sediment transport rate is derived.