Atmosphere (대기)

Korean Meteorological Society (한국기상학회)
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Quantification of Turbulence Characteristics on the Concentration Distributions of Traffic-related Pollutants Near Roadways

도로변 난류특성과 교통량에 따른 차량유발 난류강도 정량화: 도로변 풍상/풍하 측에서의 3차원 풍속 동시 측정에 기반

  • Yongmi Park (Division of Earth and Environmental System Sciences, Pukyong National University) ;
  • Subin Han (Division of Earth and Environmental System Sciences, Pukyong National University) ;
  • HanGyeol Song (Division of Earth and Environmental System Sciences, Pukyong National University) ;
  • Seung-Bok Lee (Center for Sustainable Environment Research, Korea Institute of Science and Technology) ;
  • Kyung-Hwan Kwak (School of Natural Resources and Environmental Science, Kangwon National University) ;
  • Changhyuk Kim (School of Civil and Environmental Engineering, Pusan National University) ;
  • Wonsik Choi (Division of Earth and Environmental System Sciences, Pukyong National University)
  • 박용미 (부경대학교 지구환경시스템과학부 환경대기과학전공) ;
  • 한수빈 (부경대학교 지구환경시스템과학부 환경대기과학전공) ;
  • 송한결 (부경대학교 지구환경시스템과학부 환경대기과학전공) ;
  • 이승복 (한국과학기술연구원 지속가능환경연구단) ;
  • 곽경환 (강원대학교 환경융합학부) ;
  • 김창혁 (부산대학교 환경공학과) ;
  • 최원식 (부경대학교 지구환경시스템과학부 환경대기과학전공)
  • Received : 2023.05.09
  • Accepted : 2023.07.04
  • Published : 2023.08.31
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Abstract

Turbulence produced on roadways is one of the major factors determining the dilution rates at the initial stage of traffic emissions of air pollutants and, thus, the distribution of air pollutants near the roadways. Field experiments were conducted on Gyeongbu Highway, one of the busiest highways in Korea, for 4~7 days in winter, spring, and summer. Two three-dimensional ultrasonic anemometers were installed on both sides of the highway to estimate turbulence intensities (vertical wind fluctuation and kinetic turbulence energy) induced by the roadway. Roadway-induced turbulence consists of three components: structural road-induced turbulence (S-RIT), thermal road-induced turbulence (T-RIT), and vehicle-induced turbulence (VIT). The contribution of T-RIT to the total RIT was insignificant (less than 10%), and the majority of RIT was S-RIT (by the highway embankment) and VIT. In this study, we propose the empirical relationships of VIT as a function of traffic density and wind speed under free-flow traffic conditions. Although this empirical relationship appears to underestimate the VIT, it can be applied to the air quality models easily because the relationship is simple and only needs readily obtainable input variables (wind speed and traffic information).

Keywords

Acknowledgement

본 논문의 개선을 위해 좋은 의견을 제시해 주신 심사위원께 감사를 드립니다. 이 연구는 기후변화대응 기술개발 사업(NRF-2019M1A2A2 103954)의 지원을 받아 수행되었습니다.

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