Dispersion processes in semi-enclosed basins where the flow is mainly forced by the tidal motion are studied by means of an advection-diffusion model. A parametric study was performed by varying the diffusion coefficient, the type of boundary conditions at the open boundaries of the basin and the initial position of the release. We analyzed the dependence of the initial and the asymptotic phases of the dispersion process and of the residence time in the basin, on the above parameters, and on the flow patterns corresponding to different hydrodynamic scenarios. We showed that the tidal forcing produces, on the average, a stationary diffusion process. Differences with dispersion in a stationary unidirectional flow were assessed.
All Science Journal Classification (ASJC) codes
- Aquatic Science