Plan view and elevation photographs of a smoke plume are used to estimate horizontal and vertical dispersion rates. Dispersion rates measured from individual photographs agree with Batchelor's theoretical analysis of relative diffusion. Dispersion rates measured from a composite of plume photographs agree with Taylor's theoretical analysis of single-particle diffusion. These dispersion rates are then used to calculate Eulerian turbulence parameters which are compared with observations made on a 60 m tower near the smoke-plume source. In addition, the Lagrangian turbulence time scale and the horizontal eddy diffusivity are estimated. The comparisons of estimated with observed parameters are good, suggesting that the smoke-plume technique for estimating atmospheric dispersion is realistic. © 1981.
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