Using the OSPM Model on Pollutant Dispersion in an Urban Street Canyon |
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| Authors: | HU Wei and ZHONG Qin |
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| Institution: | School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094,School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094 |
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| Abstract: | An observational campaign was conducted in the street canyon of
Zhujiang Road in Nanjing city in 2007. Hourly mean concentrations of P10
were measured at street and roof levels. The Operational Street Pollution Model
(OSPM) street canyon dispersion model was used to calculate the street
concentrations and the results were compared with the measurements. The results
show that there is good agreement between measured and predicted
concentrations. The correlation coefficient R2 values (R2 is a
measure of the correlation of the predicted and measured time series of
concentrations) are 0.5319, 0.8044, and 0.6630 for the scatter plots of
PM10 corresponding to light wind speed conditions, higher wind speed
conditions, and all wind speed conditions, respectively. PM10 concentrations
tend to be smaller for the higher wind speed cases and
decrease rapidly with increasing wind speed. The presentations of measured and
modelled concentration dependence on wind direction show fairly good agreement.
PM10 concentrations measured on the windward side are relatively smaller,
compared with the corresponding results for the leeward side. This study
demonstrates that it is possible to use the OSPM to model PM10 dispersion
rules for an urban street canyon. |
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| Keywords: | street canyon PM10 dispersion model OSPM |
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