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Evaluating the Levels of Air Pollutants and Their Affecting Factors in Highways of Tehran

Nayebyazdi, Mohammad | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43836 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Arhami, Mohammad
  7. Abstract:
  8. The concentration of air pollutants in the environment is variable according to different factors, including distances from main sources. Vehicles in streets and highways are one of the most important sources of the air pollutants. Hemmat highway is one of the most significant highways in Tehran with traffic congestion of 15000 to 18000 vehicle/hour. In this research, the concentrations of PM10 and CO were determined in different distances of Shahid Hemmat highway and the relationship diagrams of traffic and meteorology to the amount and emission of air pollutants were drawn. The concentration gradient diagrams showed exponential decay, which demonstrated that more than of 50% of air pollutants decrease in the distances between 50 to 100 m of the highway and in distances more than 100 m the contents and quantity of particles decreased significantly. The data accuracy was checked by using of CALINE4 software too. Then Hypothetical box and CALNE4 software were used for calculation of emission factors of traffic navy in different traffic conditions, which are 0.215 gr/mile and 0.195 gr/mile for PM10 in heavy and light traffic conditions, respectively. In addition, the emission factors of CO were 11 gr/mile and 9 g/mile in heavy and light terrific conditions, respectively. The obtained results were compared with existing data in Iran, and the results of CT-EMFAC software. Furthermore, the standard emission factor of CO for existing vehicles in Tehran was specified by using of Copert software and ECE-1504 standard.. Lastly, So living in the distances lower than 100 m of highways could be very harmful for people health
  9. Keywords:
  10. Air Pollution ; Carbon Monoxide ; Air Particulate Matter ; Tehran City ; Hemmat Highway

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