SIGNIFICANCE OF PARTICLE INTERACTION TO THE MODELLING OF COHESIVE SEDIMENT TRANSPORT IN RIVERS

Data from field measurements and approach to integrate particle aggregation in a hydrodynamic transport model. The turbulence model was used to calculate the coefficient of vertical turbulent mixing needed for the two-dimensional vertical-plane simulations. Experimental data for both discharge levels showed that under the prevailing uniform hydraulic conditions along the river reach the settling velocity distribution did not change significantly downstream. Results of model simulations were fitted to experimental data for total suspended matter concentration and settling velocity frequency distributions.