Tracer Tests of Eddy Diffusion in Field and Modelby Maurice J. Crickmore, Principal Sci. Ofcr.; Hydr. Res. Station, Dept. of the Envir., Wallingford, Berkshire, England,
Serial Information: Journal of the Hydraulics Division, 1972, Vol. 98, Issue 10, Pg. 1737-1752
Document Type: Journal Paper
Errata: (See full record)
A comparison is made between hydraulic model and field of the vertical and lateral spreading of a neutrally buoyant marker fluid discharged continuously at the flow surface of a tidal channel. The results support an analysis showing that a vertically exaggerated hydraulic model distorts the behavior of the plume by exaggerating its width and suppressing its vertical development. Diffusion in the field was closer to Fickian than to the 4/3 law, and it is concluded that in this instance the diffusion is primarily a function of eddies created locally by tidal currents and bed roughness.
Subject Headings: Model tests | Diffusion | Field tests | Eddy (fluid dynamics) | Probe instruments | Hydraulic models | Tides | Hydraulic roughness | Fluid flow | Comparative studies | Water discharge | Terrain models | Buoyancy
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