Stochastic analysis of concentration field in a wake region.

Environmental Science and Pollution Research International
Mohamed F Yassin, Abdirashid A Elmi

Abstract

Identifying geographic locations in urban areas from which air pollutants enter the atmosphere is one of the most important information needed to develop effective mitigation strategies for pollution control. Stochastic analysis is a powerful tool that can be used for estimating concentration fluctuation in plume dispersion in a wake region around buildings. Only few studies have been devoted to evaluate applications of stochastic analysis to pollutant dispersion in an urban area. This study was designed to investigate the concentration fields in the wake region using obstacle model such as an isolated building model. We measured concentration fluctuations at centerline of various downwind distances from the source, and different heights with the frequency of 1 KHz. Concentration fields were analyzed stochastically, using the probability density functions (pdf). Stochastic analysis was performed on the concentration fluctuation and the pdf of mean concentration, fluctuation intensity, and crosswind mean-plume dispersion. The pdf of the concentration fluctuation data have shown a significant non-Gaussian behavior. The lognormal distribution appeared to be the best fit to the shape of concentration measured in the boundary layer....Continue Reading

References

Jan 15, 2008·Environmental Monitoring and Assessment·Mohamed F YassinHideyuki Tanaka

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Citations

Jun 23, 2021·Integrated Environmental Assessment and Management·Mohamed F Yassin, Hassan A Aldashti

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