Abstract
Turbulent eddies of different sizes control the far field of pollutants discharged to the marine environment. For the fine turbulence and regular advection, the validity of the local isotropy law is considered, and it is shown how the shore, circulation cells, multiple energy inputs, velocity gradients, waves, and other factors modify this law in the coastal zone. A model of the dispersive effects due to wave-current interactions is proposed and a formula is given for the spectral eddy diffusivity due to waves and currents. A solution of the steady-state diffusion equation has been derived for a fairly general case of exponential velocities and eddy diffusivities. By the Fourier transform, this solution has been used to embody the effect of mesoscale eddies, which destroy the aforementioned regular spreading patterns. Among other tools, a step-by-step procedure is proposed as a combination of fine turbulence and mesoscale effects.
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More From: Journal of the Waterways, Harbors and Coastal Engineering Division
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