Modeling of Ground-Level Ozone Concentrations in Tehran using CMAQ Model

Hossein Nia, Bardia | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 48473 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Arhami, Mohammad
  7. Abstract:
  8. Every year, air pollution is causing immense harm to humans and the environment. To cause Air pollution, several factors are involved. Among these are the sources of emissions such as factories, power plants and Cars, meteorological factors such as temperature and wind speed and geographical conditions such as altitude, postal and looming around the area, land slope and soil type region. The aim of this study is to identify factors that affect the ozone concentration in Tehran, which could help identifying other secondary pollutants. For this purpose, a combination tailored to the geography of Tehran using CMAQ-WRF-SMOKE-made programs. This model includes four intervals each of which lasting for 5 days, covering different seasons.CMAQ model results for most stations in Tehran had a good change process so that the average correlation was obtained 0.73 respectively. The average concentration was usually less than the average observed concentration; the average ratio of model results to the observed ones was 0.51. This ratio was 0.26 in cold seasons. Overall, the average concentration was obtained in west of Tehran more than east of Tehran. Sensitivity analysis indicates that Tehran is sensitive to NOx reduction and the concentration of ozone increases when the concentration of NOx reduces. Results also shows that the city of Tehran is VOC reduction sensitive And the concentration of ozone decreases when the concentration of VOC reduces
  9. Keywords:
  10. Air Pollution ; Nitrogen Oxides ; Volatile Organic Compound (VOC) ; Community Multiscale Air Quality Modeling System (CMAQ) ; Ozone ; Tehran

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