中度污染情景下的武汉市空气质量改善研究

Investigation on the Improvement of Air Quality in Wuhan under a Moderate Pollution Scenario

文章采用空气质量模式对在中度污染天气下保障武汉市空气质量优良的3种减排措施,即对武汉市1+8城市圈的工业、电力、交通实施不同程度的减排效果进行了评估。模拟的基准时段为2015年1月7-12日。首先,该文采用武汉市空气质量监测站点的同期的气象数据和污染物浓度数据验证了模型的可靠性。随后,通过模式模拟了3种减排措施实施后的武汉市空气质量。结果表明,武汉市处于中度污染天气状态时,当城市圈各属地内工业源减排30%(减排情景1)时,PM2.5削减率基本在10%以内;当城市圈各属地内工业源、电力源和交通源都减排30%(减排情景2)时,PM2.5的削减率在9%~14%之间;当城市圈各属地内电力源减排30%、工业源减排50%、交通源减排50%(减排情景3)时,PM2.5的平均削减率可达18.78%,且空气质量可达到优良状态。

Weather Research and Forecasting(WRF)-Community Multi-scale Air Quality(CMAQ)model was used to evaluate the effectiveness of various emission control schemes on the improvement of air quality in Wuhan under a moderate pollution scenario,which occurred during January 7-12,2015.The accuracy of the model was first validated by the data of meteorology and contaminants from different monitoring stations in Wuhan.Then,cases with three emission control schemes were analyzed to evaluate the improvement of air quality.It was shown that,for base scenario of the moderate pollution event occurred in Wuhan,PM2.5 could be reduced only less than 10%when using scheme of 30%reduction of industrial source emissions in Wuhan 1+8 city circle(S1);PM2.5 could be reduced by 9%~14%when using scheme of 30%reduction of industry source,traffic source and power source emissions in Wuhan 1+8 city circle(S2),and PM2.5 could be reduced by 18.78%under the scheme of 30%reduction of power source emissions,50%reduction of industry source and traffic source emissions in Wuhan 1+8 city circle(S3),which could ensure the air quality in Wuhan to reach a good state under the base scenario of the moderate pollution event.