Author(s): Alexandra King; Edwin A. Cowen
Linked Author(s): Edwin Cowen
Keywords: No Keywords
Abstract: Aquatic vegetation plays an important role in the transport and fate of nutrients and pollutants in aquatic systems. Numerical models utilizing second order turbulence closure have proven sufficient to predict momentum and solute transport through uniform canopies of rigid, emergent vegetation, but these types of turbulence models are yet to be incorporated into more applicable numerical packages accounting for three dimensional flow, density gradients, and boundary conditions appropriate for natural water bodies, where, in particular, stratification is a significant issue. We have adapted the k-ε turbulence model within Si3D, a 3D numerical model based on the Boussinesq form of the shallow water equations, to account for emergent aquatic vegetation. The model is calibrated against velocity and concentration measurements from a series of laboratory experiments in uniform beds of Eurasian watermilfoil and performs well, especially at lower stem densities.
Year: 2009