AIR POLLUTION PATTERNS IN AN URBAN STREET CANYON

HIGH CONCENTRATIONS OF CARBON MONOXIDE IN AN URBAN STREET CANYON ARE KNOWN TO ACCOMPANY PERIODS OF SLIGHT ATMOSPHERIC DISPERSION. IT IS FOUND THAT DURING SUCH EPISODES, CERTAIN INDIVIDUAL OR COMBINED MICRO-METEOROLOGICAL AND SOURCE VARIABLES DOMINATE THE INTERACTION DURING CERTAIN TIME SEGMENTS OF THE DAY. FOR THE EARLY MORNING HOURS, THE LAPSE RATE CAN BE USED AS A GOOD PREDICTOR OF THE RESULTANT CO CONCENTRATION. TRAFFIC COUNT IS THE DOMINANT VARIABLE THEN AT ALL HOURS, EXCEPT THE EARLY AFTERNOON PERIOD WHEN THE WIND SPEED IS THE MOST DOMINANT. MODEL EQUATIONS DEVELOPED FROM STATISTICAL ANALYSIS OF FIELD DATA GENERALIZE TO THE THREE-DIMENSIONAL AIR QUALITY ASPECTS OF THE PARTICULAR URBAN ROADWAY SECTION STUDIED AND TO THOSE DISPLAYING SIMILAR CHARACTERISTICS AND WEATHER CONDITIONS. /AUTHOR/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/8675387
• Supplemental Notes:
  • PROC PAPER 10447
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Brunner, F A
  • Schnelle, K B
• Publication Date: 1974-4

Media Info

• Pagination: p. 311-23
• Serial:
  • Journal of Environmental Engineering
  • Volume: 100n
  • Issue Number: ne2
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9372
  • Serial URL: http://ojps.aip.org/eeo

Subject/Index Terms

• TRT Terms: Air pollution; Carbon monoxide; Concentration (Chemistry); Equations; Statistical analysis; Time; Traffic; Urban areas; Wind
• Uncontrolled Terms: Concentration
• Old TRIS Terms: Time factor
• Subject Areas: Data and Information Technology; Highways; Operations and Traffic Management; Safety and Human Factors;

Filing Info

• Accession Number: 00224622
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 22 2003 12:00AM