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PERFORMANCE AND LIMITATIONS OF A GAUSSIAN MODEL FOR CENTERLINE CONCENTRATIONS IN THE WAKE OF BUILDINGS
Citation:
Huber, A. PERFORMANCE AND LIMITATIONS OF A GAUSSIAN MODEL FOR CENTERLINE CONCENTRATIONS IN THE WAKE OF BUILDINGS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-88/324 (NTIS PB89206742).
Description:
The inherent variability of 10- to 60-min average ground-level plume centerline concentrations in the wake of buildings and inherent limitations on, the performance of a Gaussian plume model are presented. oint comparisons between observed and model-predicted concentrations were evaluated for three sets of field measurements. The presentation here is based on a quantitative evaluation of the same model that was qualitatively evaluated in a companion presentation (Huber, 1984). he same method prescribed for estimating enhanced dispersion in the wake of buildings and its incorporation into the Caussian plume equation is used here. A sample of performance measures is judged to provide an adequate basis for determining the strengths and weaknesses of the model. Concentrations were partitioned into groups by source-receptor distance, atmospheric stability classification, and source-release height, which provide a way of identifying possible sources of variability and error. he baseline model was adjusted to provide some contrast for assessing model performances and to help identify possible areas for model improvement. or groups with reduced measures of mean error, the variability among errors was reduced to values between 50 and 100 percent of the mean concentration, which appears here to represent the inherent limitation of a simple Gaussian plume model.