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Application of reduction scenarios on traffic-related NOx emissions in Trabzon, Turkey
Traffic-related emissions are the main sources of certain air pollutants that affect large number of people in many city centers. Because of this fact, quantification of traffic-related emissions and their dispersion modeling are required to determine human exposure to these pollutants. In this stud...
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Published in: | Atmospheric pollution research 2020-12, Vol.11 (12), p.2379-2389 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Traffic-related emissions are the main sources of certain air pollutants that affect large number of people in many city centers. Because of this fact, quantification of traffic-related emissions and their dispersion modeling are required to determine human exposure to these pollutants. In this study, the most populated Ortahisar district of Trabzon, a city located in the Eastern Black Sea region of Turkey, was selected as the study area since high traffic density is known to be one of the major sources of air pollution in this district. Moreover, air quality measurement stations located close to major roads are available to provide experimental data for model validation. Traffic emission inventory for some pollutants (NOx, SO2, CO, PM and VOCs) was prepared. Considering that NOx is the most representative air pollutant of road traffic emissions, its inventory together with topographical properties and meteorological conditions were used in AERMOD dispersion model to calculate NOx concentrations at selected receptor points. For validation, model data were compared to measurement data by certain statistical tools. According to the model results, 10.1% of the population living in Ortahisar district was exposed to traffic-related NOx concentrations higher than the regulatory limit value. In the study, five different emission reduction scenarios were tested to observe the effects on the exposure levels. Model results indicated that the measures represented by these scenarios are capable of reducing exposure levels between 2.4 and 99.5 percent.
•Traffic related NOx emissions were modeled by AERMOD software and obtained results were validated with measurements.•10.1% of people living in Trabzon city center are exposed to traffic-related NOx emissions above the limits.•Five different exposure reduction scenarios were selected and their impacts were examined.•99.5% exposure reduction can be obtained by 50% reduction in the number of heavy and light diesel-powered vehicles. |
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ISSN: | 1309-1042 1309-1042 |
DOI: | 10.1016/j.apr.2020.06.014 |