Record Display for the EPA National Library Catalog

RECORD NUMBER: 48 OF 60

OLS Field Name OLS Field Data
Main Title Relating Error Bounds for Maximum Concentration Estimates to Diffusion Meteorology Uncertainty (Journal Version).
Author Irwin, J. S. ; Rao, S. T. ; Petersen, W. B. ; Turner, D. B. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab. ;New York State Dept. of Environmental Conservation, Albany.
Publisher c1987
Year Published 1987
Report Number EPA/600/J-87/447;
Stock Number PB89-118483
Additional Subjects Atmospheric diffusion ; Error analysis ; Air quality ; Wind direction ; Plumes ; Concentration(Composition) ; Wind velocity ; Monte Carlo method ; Transport properties ; Air pollution ; Reprints ; Gaussian plume models
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB89-118483 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 03/14/1989
Collation 13p
Abstract
The paper relates the magnitude of the error bounds of data, used as inputs to a Gaussian dispersion model, to the magnitude of the error bounds of the model output. The research addresses the uncertainty in estimating the maximum concentrations from elevated buoyant sources during unstable atmospheric conditions, as these are most often of practical concern in regulatory decision making. The ability to develop specific error bounds, tailored to the modeling situation, allows more informed application of the model estimates to the air quality issues. The numerical uncertainty analysis is performed using the Monte Carlo technique to propagate the uncertainties associated with the model input. Uncertainties were assumed to exist in four model input parameters: (1) wind speed; (2) standard deviation of lateral wind direction fluctuations; (3) standard deviation of vertical wind direction fluctuations; and (4) plume rise. The authors conclude that the error bounds for the estimated maximum concentration and the distance to the maximum can be double that of the error bounds for individual model input parameters. These results allow estimation of minimum bounds on errors in model output when considering reasonable input error bounds.