수도권 전동차에서의 공기질 현황 및 다변량 통계분석을 이용한 공기질 영향인자 분석

초록

In this study, we have observed PM-10 and CO_2 concentration in the subway cabins and analyzed the factors affecting air quality using a multivariate statistical analysis. The measurements have been conducted at Seoul metropolitan subway lines. The results show that the mean concentration of the PM-10 and CO_2 inside subway cabins is in the range of 62.6 to 108.0 μg/m3 and 907 to 2,008 ppm, respectively. CO_2 level in specific sections during the rush hours has exceeded air quality guidelines for public transportation, which requires designated train ventilation controls. Correlation and regression analyses of influencing factors imply that CO_2 level is severely influenced by the number of passengers and PM-10 level is also correlated with the number of passengers. In particular, PM-10level in the cabins indicates a positive correlation with outdoor PM-10 level. In addition, the PM concentration has been highly affected by the number of passengers and distance between stations.

키워드