Author(s): I. Celik; W. Rodi
Linked Author(s):
Keywords: No Keywords
Abstract: A mathematical model for calculating suspended sediment transport is presented which consists of a hydro- dynamic model and a scalar transport model. The former provides as input into the latter the distribution of velocity and turbulent diffusivity as well as the friction velocity. The settling process is s imulated with an empirical settling velocity appearing in the particle concentration equation, and the boundary condition at the bed is specified by a net flux (i. e. deposition rate minus entra inment rate) condition. The rate of entra inment is related to the suspended s ediment-transport capacity of turbulent streams. A new relation for this capacity is derived and calibrated using available field and laboratory data. The combined hydrodynamic-sed iment transport model is applied, with the aid of a finite difference pro- cedure, to various non-equilibrium flow situations. The predicted development of the vertical concentra- tion profiles is compared with the measured one and good agreement is found between the two.
Year: 1985