Abstract
This paper describes the construction, development and application of a numerical model for calculating the flow and salinity distribution in coastal areas as a result of concentrated brine discharge from desalination plants. The flow is considered to be two-dimensional and steady; the fluid properties are assumed constant. The model applies constant eddy viscosity and diffusivity coefficients. The governing depth-integrated elliptic equations are solved by using a finite-volume iterative procedure.The mathematical model accounts for the important physical factors affecting the concentrated brine dispersion process. These are the convective and diffusive transport, wind stresses, sea-bed friction and variable sea-bed elevation. The results of a parametric study on a hypothetical desalination plant discharge, under a range of meteorological, hydrological, topographical and plant operating conditions, show the importance of the various factors and the possible effects of discharge on intake conditions. As a predictive tool, the model should help to assess impact of discharge on the marine ecosystem and plant efficiency and to investigate means of alleviating such problems.
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