The aim of this paper is to show that a photochemical box model could describe the air pollution diurnal profiles within a typical street canyon in the city of Athens. As sophisticated three-dimensional dispersion models are computationally expensive and they cannot serve to simulate pollution levels in the scale of an urban street canyon, a suitably modified three-layer photochemical box model was applied. A street canyon of Athens with heavy traffic was chosen to apply the aforementioned model. The model was used to calculate pollutant concentrations during two days with meteorological conditions favoring pollutant accumulation. Road traffic emissions were calculated based on existing traffic load measurements. Meteorological data, as well as various pollutant concentration, in order to compare with the model results, were provided by available measurements. The calculated concentrations were found to be in good agreement with measured concentration levels and show that, when traffic load and traffic composition data are available, this model can be used to predict pollutant episodes. It is noteworthy that high concentrations persisted, even after additional traffic restriction measures were taken on the second day because of the high pollution levels.


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    Title :

    Application of a three-layer photochemical box model in an Athens street canyon


    Additional title:

    Anwendung eines dreischichtigen photochemischen Modells für eine Straßenschlucht in Athen


    Contributors:


    Publication date :

    1998


    Size :

    7 Seiten, 7 Bilder, 23 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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