Atmospheric Tracer Concentrations from Elevated Source in Urban Core
Publication: Journal of Environmental Engineering
Volume 121, Issue 1
Abstract
An understanding of building wake effects is critical to the correct simulation of near-field dispersion of air pollutants that can be entrained in the wake cavity. Downwash of effluent plumes from elevated sources due to building wake effects can raise atmospheric concentrations of the effluent gas near ground level close to the source. Maximum observed ground level concentrations can be due to downwash under certain circumstances. In this field experiment 51 SF 6 samplers were deployed to measure the near-field tracer concentrations due to an elevated point source of heated effluent under stable to neutral atmospheric conditions in an urban core. Over 2,000 hourly samples were collected and analyzed. Isopleths of SF 6 hourly concentrations indicate a complicated relationship between concentration and the individual and aggregate position, as well as between concentration and the geometry of surrounding obstacles.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 121 • Issue 1 • January 1995
Pages: 5 - 15
Copyright
Copyright © 1995 American Society of Civil Engineers.
History
Published online: Jan 1, 1995
Published in print: Jan 1995
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