i.r Ilaboya - Department of Civil Engineering, Faculty of Engineering, University of Benin, P.M.B. ۱۱۵۴, Benin City, Nigeria
e Atikpo - Department of Civil Engineering,
L Umukoro - Department of Civil Engineering,
F.E Omofuma - Department of Petroleum Engineering General Abdusalami A. Abubakar College of Engineering, Igbinedion University Okada, P.M.B. ۰۰۰۶, Nigeria

The overall focus of the research work was to study the various factors that affect plume dilution and dispersion. Some of the factors that were studied include; the effects of mixing height, the effects of plume riseand the effects of terrain in addition to momentum and buoyancy on the overall dispersion of plume releasedfrom a stack of known effective height. Data on temperature versus altitude was collected using an infra - red thermometer at different height of a telecommunication mast under construction. The highest temperature for the month was noted and the validity of the recorded data was done using correlation analysis. Mathematicalanalysis was then employed to determine the mixing depth which represents the effective height of any stackthat must be placed in such location in other to allow for complete dispersion/dilution of any form of pollutantreleased from any source. Result obtained shows that the effective height of stack that can be erected in such location that will allow for effective dispersion of any pollutants was shown to be 1700m. Any stack below this height will lead to ground level pollution. Also discussed in this research paper is the application of Gaussian Plume model in the evaluation/analysis of the horizontal dispersion of pollutants released from a height (h).

Plume Dispersion, Mixing Height, Momentum/Buoyancy, Gaussian Plume equation, Air quality