Numerical modelling of 3-d tidal currents and water quality indicators in the Bristol Channel

Details are given of the principle processes of flow and contaminant transport in coastal, estuarine and inland waters and the application of computer models to predict these processes. A typical computer modelling approach is outlined, involving a finite difference solution of the three-dimensional equations of mass and momentum conservation and the advective-diffusion (or solute transport) equation. Examples are given of the application of the model to predict the spatial and temporal distributions of velocity components and water quality indicators in the Bristol Channel.