A model for the dispersion of puffs into the planetary boundary-layer. (1st January 2000)

• Record Type: Journal Article
• Authors: Rizza, U.; Mangia, C.; Degrazia, G.A.; Tirabassi, T.
• Is Part Of: International journal of environment and pollution. Volume 14:Number 1-6(2000)
• Page Start: 167
• Page End: 175
• Publication Date: 2000-01-01
• Subjects: air pollution modelling -- puff dispersion model -- spectral theory; Environmental policy -- Periodicals; Environmental engineering -- Periodicals; Environmental sciences -- Periodicals; Pollution -- Periodicals; 363.73
• Languages: English
• ISSNs: 0957-4352

Abstract

A model for the dispersion of Gaussian puffs into the planetary boundary-layer is presented. The model relies on the relative diffusion theory in which the rate of expansion of the puff is expressed in terms of the spectral properties of turbulence. A new spectral formulation for the turbulent velocities is used, which is valid for different stability conditions ranging from stable to convective. As a preliminary model evaluation, a continuous plume from the experimental campaign of Copenhagen is reproduced as a superposition of discrete emitted puffs. Comparison between predicted and measured ground level concentration data shows a good agreement both for crosswind integrated concentrations and arcwise maxima.