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Main Title Comparison of design concentrations based on hourly mixing heights estimated by RAMMET and METPRO.
Author Paumier, J. O. ; Borde, R. W.
Other Authors
Author Title of a Work
Coulter, Thomas.
Paumier, James.
Brode, Roger W.
CORP Author Pacific Environmental Services, Inc., Research Triangle Park, NC.;Environmental Protection Agency, Research Triangle Park, NC. Office of Air Quality Planning and Standards.
Publisher U.S. Environmental Protection Agency,
Year Published 1993
Report Number EPA-454/R-93-052; 68D00124; EPA-68-DO0124
Stock Number PB94-131315
OCLC Number 29821648
Additional Subjects Air pollution ; Design ; Meteorological data ; Concentration(Composition) ; Dispersion ; Mixing ; Height ; Estimates ; Algorithms ; Mathematical models ; Performance evaluation ; Atmospheric circulation ; Atmospheric diffusion ; Plumes ; Pittsburgh(Pennsylvania) ; Oklahoma City(Oklahoma) ; Brownsville(Texas) ; Meteorological preprocessors
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EKBD  EPA-454/R-93-052 Research Triangle Park Library/RTP, NC 02/18/1994
ELBD ARCHIVE EPA 454-R-93-052 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
NTIS  PB94-131315 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation vi, 24 pages ; 28 cm
A consequence analysis was conducted to investigate the effect on design concentration values resulting from using two different methods for estimating mixing height. Two years of meteorological data from Pittsburgh, PA, Oklahoma City, OK and Brownsville, TX were processed through RAMMET and METPRO meteorological preprocessors. The mixing heights from METPRO were merged with the RAMMET output and separate ISCST2 model runs were made using the two sets of mixing heights from each site and year. The effects of the two mixing-height algorithms on predicted high second-high pollutant concentrations (design concentrations) were compared. The 1-hr design concentrations using mixing height estimates from METPRO were generally larger than those using RAMMET mixing heights for the three point sources by about 20%. Similar results were obtained when the data were paired in time and space. This tendency was not as apparent for other averaging times. For the ground-level area source, the potential for unusually large concentrations from extremely small mixing heights is far greater when using RAMMET mixing heights.
Work Assignment Manager: Thomas Coulter. "Prepared by Mr. James O. Paumier and Mr. Roger W. Brode of Pacific Environmental Services, Inc."--Page ii. "Office of Air Quality Planning and Standards." "Technical Support Division." "December 1993." Contract No. 68D00124. Includes bibliographical references (page 24).