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An investigation of the transport and dispersion of atmospheric pollutants over Nairobi City

Ongoma, Victor and Otieno, George and Omondi, Onyango (2014) An investigation of the transport and dispersion of atmospheric pollutants over Nairobi City. Journal of Environmental and Agricultural Sciences, 1 (10). pp. 1-10. ISSN 2313-8629

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    Abstract

    Current rapid deterioration of air quality in most urban can be majorly attributed to ongoing urbanization. This study simulates air pollutant dispersal over Nairobi city using Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) model, considering a case for emission of Total Suspended Particles (TSP) into the environment. The wind climatology was established using Wind Rose Plot (WRPlot) view. The predominant wind speed over the city is 4-6 knots and the wind direction is easterly. The forward trajectory of a pollutant released in the city is generally observed to flow to the western side of the city. The pollutant is observed to be dispersed beyond 100 km from the city reducing the concentration of the same in the city. The study recommends for a consultative planning process of the city that factors in the wind characteristics over the city; most industrial activities should be located to the extreme western side of the city to minimize concentration of pollutants over the city. The study further recommends research to be carried out for a longer period of time to ascertain the quality of rain water during the long rain season. This calls for accurate observation and monitoring of pollution levels over the city and other cities in the country.

    Item Type: Journal Article
    Subjects: G Geography. Anthropology. Recreation > G Geography (General)
    G Geography. Anthropology. Recreation > GB Physical geography
    G Geography. Anthropology. Recreation > GE Environmental Sciences
    Divisions: Faculty of Science, Technology and Environment (FSTE) > School of Geography, Earth Science and Environment
    Depositing User: Victor Ongoma
    Date Deposited: 07 May 2019 12:21
    Last Modified: 07 May 2019 12:21
    URI: http://repository.usp.ac.fj/id/eprint/11537
    UNSPECIFIED

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