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Exposure Efficiencies of Urban Air Pollution Sources in Beijing City
Pages: 33-35
Year: Issue:  4
Journal: Urban Environment & Urban Ecology

Keyword:  exposure efficiencyISCST3concentration distributionpopulation density;
Abstract: The concept and method of exposure efficiency are used to precisely estimate the pollution intensity at a specific region resulted by various air pollution sources of industrial sectors. The pollution contribution ratio of SO 2, PM 10 and NO x and relative exposure efficiency to residents are calculated using air pollution dispersion model ISCST3 and data of pollutants loadings, annual meteorology and urban population in the case of Beijing city. The results present that the SO 2 exposure efficiencies are 2×10 6~20×10 -6 and PM 10 ,NO x are 2×10 -6 ~50×10 -6 ,respectively. The exposure efficiencies of heating and transportation industries are much higher. Although with stronger loading,on the other hand,the exposure efficiency of power plants is rather lower due to its far distance away from urban area and higher emission height.
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