A MODEL FOR CALCULATING DISPERSION AND DEPOSITION OF SMALL PARTICLES FROM A LOW LEVEL POINT SOURCE

Authors
  1. Mellsen, S.B.
Corporate Authors
Defence Research Establishment Suffield, Ralston ALTA (CAN)
Abstract
A mathematical model for estimating concentrations and ground deposition densities from a low level point source of particulates up to 20 mu m in diameter has been developed. The model applies K theory to account for vertical dispersion and Gaussian spread to account for lateral dispersion. Results for the limiting case of zero terminal velocity with negligible retention at the ground are compared directly to field experimental data for a source near ground level to establish the validity of using Gaussian lateral dispersion from an elevated source. The vertical dispersion function and lower boundary condition for an existing line source model were applied in the present point source model. Previous comparison to ground deposition densities measured in various field experiments indicate that estimates from the line source model are reasonable, although further experiments would be useful.
Report Number
DRES-500 —
Date of publication
15 Feb 1988
Number of Pages
90
DSTKIM No
88-02120
CANDIS No
55350
Format(s):
Microfiche filmed at DSIS;Originator's fiche received by DSIS;Hardcopy

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