클린로드 시스템 가동이 도로변 PM10 농도에 미치는 영향 분석 - 대구지역의 사례연구 -
Estimation of the Effect of Clean Road System on the PM10 Concentration at a Heavy Traffic Roadside - A Case study for Daegu City -
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In Daegu, a road cleaning system was constructed in the central part of the city and has been operated from April, 2011. We evaluated the effect of the system on the concentration of PM10 at a roadside monitoring site. The ambient PM10 concentration data were logged every 1 min for a period of 20 weeks from May to October, 2011, by means of light scattering method, and then every 5 min data were used in the statistical analysis. The measured data were verified by comparing them with beta-ray data obtained at the same site. Correlation coefficient between the two groups was highly significant (r=0.79), though the absolute levels of light scattering data appeared to be approximately 2.8 times higher than the beta-ray data. Diurnal, daily, weekly, and monthly variations of PM10 data did not show any evidence of decreasing effect owing to the clean road system. A comparison of roadside PM10 data with non-roadside data also revealed very similar pattern, implying the variation of the PM10 concentrations is mainly affected by the traffic conditions near the monitoring site. However, if the operating conditions of the clean road system can be improved, i.e. increasing the frequency and duration of water cleaning, the road cleaning effect may improve the air quality indirectly by means of removing the resuspended particles from the road.
Abstract
In Daegu, a road cleaning system was constructed in the central part of the city and has been operated from April, 2011. We evaluated the effect of the system on the concentration of PM10 at a roadside monitoring site. The ambient PM10 concentration data were logged every 1 min for a period of 20 weeks from May to October, 2011, by means of light scattering method, and then every 5 min data were used in the statistical analysis. The measured data were verified by comparing them with beta-ray data obtained at the same site. Correlation coefficient between the two groups was highly significant (r=0.79), though the absolute levels of light scattering data appeared to be approximately 2.8 times higher than the beta-ray data. Diurnal, daily, weekly, and monthly variations of PM10 data did not show any evidence of decreasing effect owing to the clean road system. A comparison of roadside PM10 data with non-roadside data also revealed very similar pattern, implying the variation of the PM10 concentrations is mainly affected by the traffic conditions near the monitoring site. However, if the operating conditions of the clean road system can be improved, i.e. increasing the frequency and duration of water cleaning, the road cleaning effect may improve the air quality indirectly by means of removing the resuspended particles from the road.
참고문헌 (7)
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