【摘要】 为研究地铁站排风污染对下风向区域的影响规律，以华东地区某典型地铁站为例进行实地测试，定量分析地铁站风亭排风中污染物的浓度水平、时空分布特征、下风向的影响距离及其影响因素。研究发现，地铁排风风速为（2.57±0.67） m/s、排风温度为（21.10±0.09）℃、排风湿度为（71.4±4.3）%；PM_2.5和总挥发性有机化合物（TVOC）排风污染浓度水平分别为（32.37±7.00） μg/m³和（497±27） μg/m³，对下风向区域的影响范围大约在10 m。此外，排风中的颗粒物污染浓度水平主要与环境湿度和室外颗粒物污染浓度水平相关，而TVOC污染浓度水平则主要受环境湿度的影响。以期为深入了解地铁站污染排放特征及其控制策略提供科学参考。更多还原

【Abstract】 To investigate the impact patterns of subway station exhaust pollution on downwind areas,a typical subway station in East China was selected for field testing,conducting quantitative analysis on the concentration levels of pollutants in the subway station’s ventilation shaft exhaust,their spatiotemporal distribution characteristics,the influence distance downwind,and the influencing factors.The study found that the subway exhaust parameters were （2.57±0.67） m/s for wind speed,（21.10±0.09） ℃ for temperature,and （71.4±4.3）% for humidity.The pollution concentration levels were （32.37±7.00） μg/m3 for PM_2.5 and （497±27） μg/m3 for TVOC,with the influence range on the downwind area being approximately 10 meters.Additionally,the particulate pollution concentration in the exhaust was mainly related to environmental humidity and outdoor particulate pollution concentration levels,while the TVOC pollution concentration was primarily affected by environmental humidity.This study provides scientific reference for a deeper understanding of the pollution emission characteristics of subway stations and their control strategies.更多还原