Evaluation of rural-air-quality simulation models. Addendum B: graphical display of model performance using the Clifty Creek data base

Technical Report · Thu Aug 01 00:00:00 EDT 1985

OSTI ID:5886865

Cox, W M; Moss, G K; Tikvart, J A; Baldridge, E

The addendum uses a variety of graphical formats to display and compare the performance of four rural models using the Clifty Creek data base. The four models included MPTER (EPA), PPSP (Martin Marietta Corp.), MPSDM (ERT), and TEM-8A (Texas Air Control Board). Graphic displays were developed and used for both operational evaluation and diagnostic evaluation purposes. Plots of bias of the average vs station downwind distance by stability and wind-speed class revealed clear patterns of accentuated underprediction and overprediction for stations closer to the source. PPSP showed a tendency for decreasing overprediction with increasing station distance for all meteorological subsets while the other three models showed varying patterns depending on the meteorological class. Diurnal plots of the bias of the average vs hour of the day revealed a pattern of underestimation during the nocturnal hours and overestimation during hours of strong solar radiation with MPSDM and MPTER showing the least overall bias throughout the day.

• Research Organization: Environmental Protection Agency, Research Triangle Park, NC (USA). Office of Air Quality Planning and Standards
• OSTI ID: 5886865
• Report Number(s): PB-86-148426/XAB; EPA/450/4-83/003B
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
MATHEMATICAL MODELS
AIR QUALITY
RURAL AREAS
EVALUATION
STATISTICAL DATA
SULFUR DIOXIDE
THEORETICAL DATA
CHALCOGENIDES
DATA
ENVIRONMENTAL QUALITY
INFORMATION
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
POLLUTION
SULFUR COMPOUNDS
SULFUR OXIDES
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)