An estimation of pollutant diffusion rates during calm conditions
Tóm tắt
Diffusion rates during calm conditions have been determined in dependence of stability. Similarity laws in an unstable and neutral atmosphere can be applied to calms provided the wind velocityu is substituted by the «critical» wind velocityu
c which defines the onest of a calm. For a stable stratification vertical diffusion rates may be estimated by means ofP-G curves and the same procedure was applied to the horizontal diffusion as well.
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