Development Of A 3D Non Cohesive SuspendedSediment Transport Model For Free Surface Flows

The mathematical model for simulating three-dimensional (3D) suspended sediment (SS) transport under non-equilibrium situations is described. The model consists of a refined hydrodynamic model and a scalar transport model involving bed boundary conditions for either the sediment flux to or from the bed, or an estimated concentration level. It may be applied with the rigid-lid assumption or with an effective water-depth calculation so as to take the free surface effects into account. A test case for a situation with net erosion flux from the bed is presented, and the predicted development of the concentration profiles is compared with measurements.