Investigation of Diurnal Pattern of Generation and Resuspension of Particles Induced by Moving Subway Trains in an Underground Tunnel
| Autor: | Jong Bum Kim, Sang-Hee Woo, Moon Se Hwang, Se-Jin Yook, Hwa Hyun Yoon, Gwi-Nam Bae, Gil Hun Tahk |
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| Rok vydání: | 2018 |
| Předmět: |
010504 meteorology & atmospheric sciences
Particle number Diurnal temperature variation Mechanics Aerodynamics 010501 environmental sciences 01 natural sciences Pollution Aerosol Environmental Chemistry Environmental science Particle Mass concentration (chemistry) Train Exponential decay 0105 earth and related environmental sciences |
| Zdroj: | Aerosol and Air Quality Research. 18:2240-2252 |
| ISSN: | 2071-1409 1680-8584 |
| DOI: | 10.4209/aaqr.2017.11.0444 |
| Popis: | To protect the health of subway users, it is essential to investigate the generation, resuspension, and decay of particles in underground tunnels. In this paper, we analyzed the diurnal pattern of variation in particle concentration in a subway tunnel. The mass concentration of particles was measured in a shelter located midway in the underground tunnel connecting Janghanpyeong station and Gunja station on Seoul Subway Line 5 by using an aerodynamic particle sizer, a dust monitor, and a fast mobility particle sizer. The particle mass concentration increased uniformly as a train passed through the tunnel, which was followed by an exponential decay. The particle concentration in the tunnel decreased when the decrease in the number of particles between train operations exceeded the number of particles generated and resuspended by a passing train, and increased in the opposite case. The diurnal variation in particle concentration in the tunnel according to train operations can be predicted by applying such a pattern of variation to the mass concentration of particles. |
| Databáze: | OpenAIRE |
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