Author(s)

H. Morvan, G. Pender & A. Ervine

Abstract

Three-dimensional simulation of river flood flows H. Morvan* , G. Fender^ & A. Ervine* ' Department of Civil Engineering,The University of Glasgow, Scotland * Department of Civil and Offshore Engineering,Heriot-Watt University, Scotland Abstract The velocity field in meandering river channels during overbank flows is fully three-dimensional. To date, there have been few attempts to simulate this behaviour using three-dimensional computer models; most investigations have been experimental or used two-dimensional computer models that assume a hydrostatic pressure distribution. Fully three-dimensional simulations are important, as they will improve our understanding of the velocity field and the role of turbulence in determining this, particularly along the shear layer where the flood plain and main channel flows interact. This in turn will have practical implications for our knowledge of the mechanics of channel morphology, pollutant transport and conveyance capacity. In the

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