Abstract
SYNOPSISMixing problems in a shallow coastline water with horizontal velocity distribution are cosidered. The maximum scale within which mixing phenomena are classified into diffusion in coastline waters is first inferred from existing data. Law of similitude in a reasonably straight channel is reconsidered for a distorted Froude similarity model focusing our attention on the three-dimensional velocity distribution. An analysis of the dispersion in the flow field which has the deviation of flow velocity in transverse direction due to meso-scale turbulence of topographical origin has been performed through a circulation model.The circulation model permits the estimation of the longitudinal dispersion coefficient from the geometry and the flow velocity of the system, making use of the experimental relationship between the transverse diffusion coefficient and the intensity of the circulation in wake regions obtained in a simple hydraulic model. Agreement of the predicted value of the longitudinal dispersion ...
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