Apphlication of a dispersion model for szeged, a medium sized hungarian city: a case study

András Zénó Gyöngyösi, Tamás Weidinger, László Makra, Györgyi Baranka

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Abstract

The aim of the study is the application of the CAR model to a medium-sized Hungarian city, Szeged. To study the sensitivity of the model, the concentration of pollutants as a function of distance from road axis, the effects of wind speed, road type and tree factor on the concentration as well as the concentration of the pollutants at different traffic speeds were analyzed and quantified. To summarize our results, main findings are as follows: the level of pollution increases with (i) increasing number of vehicles, (ii) decreasing speed in urban traffic (i.e., less than 50 km-h-1), (iii) larger fraction of heavy vehicles, (iv) increasing number of trees alongside the roads and (v) smaller mean annual wind speed. In addition, the model had been run on realistic input parameters, regional and city background concentration. Street geometry and traffic data for the period 1997-2007 at Szeged have been used. Model results have been compared to measurements showing good agreement with a slight overestimation of concentration due to the insufficient consideration of technical development of the vehicles; however, modelled data are showing smaller deviation than measurements.

Original languageEnglish
Pages (from-to)788-797
Number of pages10
JournalFresenius Environmental Bulletin
Volume18
Issue number5 B
Publication statusPublished - Aug 10 2009

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Keywords

  • Air pollution
  • Hungary
  • Statistical model
  • Szeged
  • Traffic emission
  • Transport

ASJC Scopus subject areas

  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution

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