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The sum of the four exponential terms in converges to a final value quite uggs adirondack boot ii sale
rapidly. For most cases, the summation of the series with m = 1, m = 2 and m = 3 will provide an adequate solution. The two most important variables affecting the degree of pollutant emission dispersion obtained are the height of the emission source point and the degree of atmospheric turbulence. The more turbulence, the better the degree of dispersion.
The resulting calculations for air pollutant concentrations are often expressed as an air pollutant concentration contour map in order to show the spatial variation in contaminant levels over a wide area under study. In this way the contour lines can overlay sensitive receptor locations and reveal the spatial relationship of air pollutants to areas of interest.
The Briggs plume rise equations
The Gaussian air pollutant dispersion equation (discussed above) requires the input of H (also known as the effective plume height, He) which is the pollutant plume's centerline height above ground level. He at any distance from tall bailey button uggs on sale the pollutant plume's source is the sum of Hs (the actual physical height of the pollutant plume's source point) plus H (the plume rise due the plume's buoyancy) at that distance. Briggs first published his plume rise observations and comparisons in 1965. In 1968, at a symposium sponsored by CONCAWE (a Dutch organization), he compared many of the plume rise models then available in the literature. In that same year, Briggs also wrote the section of the publication edited by Slade dealing with the comparative analyses of plume rise models. That was followed in 1969 by his classical critical review of the entire plume rise literature, in which he proposed a set of plume rise equations which have became widely known as "the Briggs equations". Subsequently, Briggs modified his 1969 plume rise equations in 1971 and in 1972.?Do These 5 Things to Your Website uggs snow boots on sale
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