Research Article
Jun 1982
Mean of Autocorrelated Air Quality Measurements
Authors: Cynthia S. Hirtzel, AM.ASCE, Jimmie E. Quon, F.ASCE, and Ross B. Corotis, M.ASCEAuthor Affiliations
Publication: Journal of the Environmental Engineering Division
Volume 108, Issue 3
Abstract
The high degree of autocorrelation present among the observations in a continuous record of air quality has significant implications with respect to the estimation of the mean value of air pollutant concentration and to the determination of data collection requirements for estimating air quality levels. Based on the characterization of the form of the autocorrelation function, equations are derived for the equivalent number of independent observations in a sample of given size. An expression for the variance of the sample mean of an autocorrelated series is derived; and equations to estimate data collection requirements for a sequence of air quality measurements are developed. These equations yield both the number of equivalent independent measurements and the number of measurements in a continuous record needed to estimate the mean value at given levels of precision and significance. The derived results are applied to observed ambient carbon monoxide measurements.
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Published In
Journal of the Environmental Engineering Division
Volume 108 • Issue 3 • June 1982
Pages: 488 - 501
Copyright
© 1982 American Society of Civil Engineers.
History
Published in print: Jun 1982
Published online: Feb 11, 2021
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Affiliations
Cynthia S. Hirtzel, AM.ASCE
Asst. Prof., Dept. of Chemical and Environmental Engrg., Rensselaer Polytechnic Inst., Troy, N. Y. 12181
Jimmie E. Quon, F.ASCE
Former Prof. and Chmn., Dept. of Civ. Engrg., Northwestern Univ., Evanston, Ill. 60201
Ross B. Corotis, M.ASCE
Prof., Dept. of Civ. Engrg./Material Science and Engrg., Johns Hopkins Univ., Baltimore, Md. 21218
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.