2D Hydraulic model

Hydrodynamics of gravel-bed rivers

Research into flow hydraulics within gravel-bed rivers has involved a combination of field investigation (using Acoustic Doppler Velocimetry) and 2D and 3D numerical modelling.

2D hydrodynamic models based on the depth-averaged shallow water equations have been applied to quantify flow patterns within braided channels (see right), and thus to constrain statistical models of velocity and shear stress distributions.

3D Computational Fluid Dynamics modelling has included the development of new methods of representing bed roughness (e.g., drag law approaches) and characterisation of near-bed flow structures at sub-mm resolution (see below).

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