Accession Number:

ADA094003

Title:

Analysis for the Accuracy Definition of the Air Quality Assessment Model (AQAM) at Williams Air Force Base, Arizona. Volume II Appendices.

Descriptive Note:

Final rept. Jul 76-Mar 80,

Corporate Author:

AIR FORCE ENGINEERING AND SERVICES CENTER TYNDALL AFB FL ENGINEERING AND SERVICES LAB

Report Date:

1980-03-01

Pagination or Media Count:

261.0

Abstract:

The Air Quality Assessment Model AQAM overall predictive accuracy is analyzed using actual air base ambient air quality measurements. These measurements of CO, No, NOX, THC, CH4, and visibility at Williams Air Force Base, Arizona, from June 1976 to June 1977 were compared with AQAM predicted air pollution concentrations to determine AQAMs predictive power. The AQAM accuracy is analyzed on an hour-by-hour basis and statistical basis using accumulative frequency distribution. The conclusions are that AQAM accuracy is well within the accuracy range expected for Gaussian urban dispersion models. Even though an attempt was made to select an isolated base from urban background emissions, the background concentration had to be accounted for in the analysis. Concentrations in the air base vicinity were extremely low when compared with background concentrations resulting from urban transport. Without the background concentration adjustments, the AQAM model tended to underpredict the pollutant concentrations. The results also indicate that AQAM is especially accurate in simulating the potential worst case airbase concentrations associated with morning hours, low wind speeds, stable atmospheric conditions, and high activity. Author

Subject Categories:

  • Statistics and Probability
  • Combustion and Ignition
  • Air Pollution and Control

Distribution Statement:

APPROVED FOR PUBLIC RELEASE