Title: A model for the dispersion of puffs into the planetary boundary-layer

Authors: U. Rizza, C. Mangia, G.A. Degrazia, T. Tirabassi

Addresses: ISIAtA/CNR Strada Provinciale Lecce-Monteroni km 1.200 I-73100, Lecce, Italy. ISIAtA/CNR Strada Provinciale Lecce-Monteroni km 1.200 I-73100, Lecce, Italy. Universidade Federal de Santa Maria, Santa Maria, Brazil. FISBAT/CNR Via Gobetti 101, I-40129 Bologna, Italy

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.

Keywords: air pollution modelling; puff dispersion model; spectral theory.

DOI: 10.1504/IJEP.2000.000538

International Journal of Environment and Pollution, 2000 Vol.14 No.1/2/3/4/5/6, pp.167-175

Published online: 18 Jul 2003 *

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