PLUME DISPERSION FROM GROUND LEVEL SOURCES IN SIMULATED ATMOSPHERIC BOUNDARY-LAYERS

Measurements of plume dispersion in urban and rural simulated boundary layers are compared with full scale data and theoretical treatments of plume behaviour. The experiments were conducted in the Marchwood Engineering Laboratories (MEL)9.1 × 2.7 m wind tunnel using sources of negligible buoyancy and momentum in 1/1000 and 1/300 scale neutrally stable, simulated atmospheric boundary layers. The theoretical considerations include gradient-transfer theory (analytic and numerical), similarity and statistical theory. The results of the comparisons are then used to demonstrate that the plume behaviour observed in the wind tunnel was a reasonable simulation of the Pasquill class D-C atmospheric behaviour. © 1978.