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Optimization of the Prediction Model of Suspended Matter Diffusion Caused by Marine Engineering
Author(s): 
Pages: 95-100
Year: Issue:  2
Journal: Ocean Technology

Keyword:  Reynolds-averaged Navier-stokes equationsconvective diffusion water quality modelimpact contribution degree parameter;
Abstract: On the basis of a deep understanding of the natural conditions of the sea area adjacent to marine engineering, the hydrodynamic regime of engineering adjacent sea area is simulated by the Reynolds-averaged Navier-stokes equations. Then nested by the models of sea area near two engineering constructions, the water level boundary conditions are interpolated and calculated by full hydrodynamic free-surface numerical finite volume discrete model using coarse grids. The distributions of particle concentration filed are simulated by a twodimensional water quality convective diffusion numerical model considering the impact of point source intensity of two engineering constructions. The maximal concentration growth caused by the two engineering constructions are selected as water quality control points, while continuous concentrations of per unit intensity of pollutants are set to engineering construction locations to calculate the impact contribution degree parameters of the two constructions on water quality control points. It can be concluded that the impact contribution degree of engineering construction 1 is much greater than that of construction 2 by 65%, which is attributed to construction site and hydrodynamic regime: construction 1 is located at bayhead, and therefore has shallower water depth,lower current velocity, weaker water exchange ability and lower dispersal ability.
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