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Evaluation and Management of Ambient Air Quality, with Special Reference to China

Published online by Cambridge University Press:  24 August 2009

Yao Zhi-Qi
Yao Zhi-Qi
Affiliation:
Associate Professor of Environmental Health and Deputy Director, Department of Environmental Health, School of Public Health, Shanghai First Medical College, Foong Lin Chiao, Shanghai 200032, People's Republic of China.†
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Extract

Monitoring and evaluation of air quality in urban and industrial areas are essential for air quality management. For evaluating the composite air-quality in the concomitant presence of several pollutants in the atmosphere, many air quality indices have been developed. This paper presents two indices, the ‘composite air-quality index (I1)’ and ‘the standard-exceeding index of air pollution (I2)’ together with their respective sub-indices, for the pollutants monitored and for use in combination.

The first index, I1, is based on the annual average concentration measured in a year for each pollutant; it measures the overall composite air-quality. By relating the annual average concentration (Ci) of each pollutant to its hygienic standard (Si), as many (Ci/Si) values as the number of pollutant parameters monitored are found, whereupon I1 is computed as the geometric mean of the maximum and average of all (Ci/Si) values. A greater value of I1 means worse composite air-quality. It is simpler to compute than those more sophisticated ones in the literature, and holds the unique characteristic of considering, and yet not overemphasizing as formula (3) does (Nemerow, 1974), the maximum (Ci/Si) value.

Type
Main Papers
Information
Environmental Conservation , Volume 7 , Issue 3 , Autumn 1980 , pp. 223 - 228
Copyright
Copyright © Foundation for Environmental Conservation 1980

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References

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