ABSTRACT
The paper describes a number of recent research developments which have been undertaken in connection with the refinement and application of a two-dimensional depth integrated numerical model for predicting tidal currents and solute concentration distributions in coastal and estuarine waters. The main refinements reported herein include:-(i) imrovements in the turbulence modelling using the k-e turbulence model, (ii) comparison of nested and patched modelling techniques, (iii) improvements to the representation of flooding and drying and wind stress effects, and (iv) application of a modified version of the QUICK scheme for modelling high solute gradients. These model refinements have been developed for model applications to:— (i) an idealized rectangular harbour laboratory study, (ii) nitrate level predictions in Poole Harbour, and (iii) faecal coliform levels predicted around Bridlington Sea Outfall. The resulting model refinements were shown to give improved predictions of the tidal current structure and the solute concentration distributions in all cases.
