SPM: an operative model for the dispersion of skewed puffs

摘要

A practical puff model based on the Monin-Obukhov similarity theory is presented. Themodel (sritten in FORTRAN and named SPM: Skewed Puff Model) utilises approximate solutions proposed by van Ulden for the dispersion of a cloud of passive contaminant released from a source near the ground and where particular importance is given in describing the interaction between wind shear and vertical diffusion and in the process that transforms shear produced skewness into diffusive variance in the wind direction.