Author(s)

D.W. Dunsbergen & G.S. Stalling

Abstract

The combination of a random walk method and a hydrodynamic model for the simulation of dispersion of dissolved matter in water D.W. Dunsbergen, G.S. Stalling Delft University of Technology, Department of Civil Engineering, Hydraulic and Geotechnical Engineering, The Netherlands ABSTRACT A three-dimensional particle model with random walk has been applied to simulate the dispersion of dissolved matter in water. The particle model uses flow information obtained with a hydrodynamic model. This flow information is only available at discrete grid points. The grid is curvilinear in the horizontal plane and uses the sigma-coordinate in the vertical. The advective part of the particle model reproduces closed streamlines in recirculation zones. A reflection principle at closed boundaries is given, which does not introduce an artificial diffusion. INTRODUCTION Three-dimensional (3D) hydrodynamic simulations are often executed to analyze water quality problems. The advect

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