Mathematical Modelling of Morphological Processes in the Case of Suspended Sediment Transport

摘要

A two-dimensional (2D) vertical model and a three-dimensional (3D) mathematical model have been developed to study the morphological processes in case of suspended sediment transport. The basic equation of these models is the convection-diffusion equation for the suspended sediment particles. To solve the equation numerically, the flow velocities, the sediment mixing coefficients and the particle fall velocity must be known, while also appropriate boundary conditions must be prescribed. Applying the 2D and 3D model, the influence of the basic physical parameters and the boundary conditions on the morphological processes has been investigated in detail. The sutrench-2D model has been verified extensively using flume and field data. The sutrench-3D model has not yet been verified, but computations for a test case seem to show realistic results.