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Bogotá air quality

Bogotá air quality. Colombia , 200 3. Bogota city. Average altitude: 2600 m ASL 7.000.000 Inhabitants 1.000.000 Vehicles 4.000 Industries. The Topography. Eastern mountain chain. Magdalena river. Bogota Savanna. Eastern hills. Secondary polluants. Primary polluants. EFFECTS.

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Bogotá air quality

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  1. Bogotá air quality Colombia, 2003

  2. Bogota city Average altitude: 2600 m ASL 7.000.000 Inhabitants 1.000.000 Vehicles 4.000 Industries

  3. The Topography Eastern mountain chain Magdalena river Bogota Savanna Eastern hills

  4. Secondary polluants Primary polluants EFFECTS SOURCES POLLUTANT DISTRIBUTION DISPERSION (transport and turbulence) TRANSFORMATION (chemistry) EMISSIONS sun H2SO4 Photooxidants O3, PAN HNO3 humidity rain PM CO2 VOC PM Heavy metals CO NOx SO2 Industries Heatings Vegetation growth Biogenic Health Traffic

  5. Development of an air quality management system (AQMS)

  6. The project Design of abatement strategies Environmental impacts Air quality model Emission inventory Pollutants distribution Measurements Measurements Meteorological model

  7. 212 km Model domain Area: 212 x 212 Km Cells: 4 x 4 Km Temporal resolution: 1 h

  8. Emission inventory Sources are classified in 4 groups: - Stationary sources - Mobile sources - Aerial sources - Natural environment Sources and pollutants included Pollutants included: CO SO2 NOx CH4 VOCNM CO2 PM10

  9. Emission inventory Stationary sources in the Bogotá zone • Stationary sources • Point sources: • - Important Industries • (106) • Areal sources: • - Small industries • (4712) • - Municipal landfill (1) • - Gasoline marketing

  10. CO, SO2, NOx CH4, CO2 CO2 15% 7% X Industry (region) X Industry (Bogota) X Municipal landfill PM10, COVNM 78% CO2, CH4 Emission inventory Stationary sources Critical zones of the domain Distribution of stationary emissions

  11. Emission inventory Mobile sources Traffic model: Number of vehicles AIREMIS calculates vehicular emission based on: Georreferenced street network: - 2600 segments Traffic model: - Car counting campaings - Number of vehicles/hour - Average speed The fleet composition The emission factors - COPERTIII methodology - Local emission factors

  12. Emission inventory Mobile sources Local emission factors An economical and practical methodology was applied to determine emissions from the vehicular fleet of Bogotá city The methodology is based on air quality and meteorological measurements, traffic counts and inverse application of an air quality model.

  13. Emission inventory Mobile sources Estimated emission factors for the different categories g/veh/km

  14. CO 16% Heavy Light 84% Emission inventory Variations of CH4 vehicle emissions during a common day Mobile sources CO vehicle emissions over the domain Distribution of vehicle emissions

  15. Bogotá Emission inventory Natural environment Land use over the domain It takes into account: The sources - Forest area - Low vegetation - Soils Environmental factors - Temperature - PAR (Photosynthetical activity radiation)

  16. Emission inventory Natural environment VOCNM emissions over the domain

  17. Emission inventory Mobile Stationary Aereal Natural Total emissions Critical zones of the domain Distribution of total emissions by source

  18. Monitoring stations

  19. Meteorological model results: Wind field

  20. NOx concentrations

  21. Ozone concentrations

  22. Ozone plume

  23. Ozone Ozone isopleths Merck, Nacional Low Hight NOx Hight Corpas, Monserrate, Duque Low VOCs

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