Preliminary results from air quality modelling in Dakar.

The current report summarises the preliminary results from air quality modelling in Dakar. The results show that the industrial sources have a lower impact on ground level concentrations of SO2and NO2than traffic and area sources, even if they have a relatively high share of the total emissions. Traffic is responsible for 93% of the modelledaverage NO2concentrations, while the 15 industries included in the database are responsible for 4% and household emissions for 3%. Concerning SO2average concentrations, the industries are responsible for 35%, traffic for 54% and households for 11%. The little amount of air quality measurement data available at the end of the project was neither adequate nor sufficient to fully test the AirQUIS dispersion model in Dakar. The preliminary evaluation of the model shows satisfactory results.