重庆主城区人工增雨对空气质量的影响分析

The Analysis of Air Quality Impact by Artificial Precipitation in the Main Urban Areas of Chongqing

利用重庆市主城区2004—2008年1-3月和11-12月的降水资料和空气污染指数资料,分析了重庆市主城区24 h降水对空气污染指数的影响,以及实施人工增雨作业对城市空气质量的改善情况.结果表明：在冬半年,主城区降水对空气中污染物有明显的净化作用,对PM10和SO2净化作用要强于NOx;当24 h降雨量大于或等于6mm时,空气污染状况明显改善,当日空气质量基本达标;统计分析人工增雨对城市空气质量的影响,按不同增雨效率计算,在冬半年开展人工增雨作业后,平均可以让城市空气质量达标天数增加3.4-6.2 d.

Use precipitation and environmental monitoring data in Jan～Mar and Nov～Dec from 2004 to 2008 in the main urban areas of Chongqing,make a study on Correlation between precipitation and air pollution index,and research for the theoretical analysis of the influence on air quality by artificial precipitation.The result show that： Precipitation can clean the air pollutants,in which the purification effect for PM10 and SO2 is better than NOx.When the amount of rainfall is over 6mm,the air quality reaches the standard.Done a statistical in the impact effects and the follow-up impact effects by artificial rainfall on API when do artificial rainfall operations in stronger rainfall precipitation days and weaker days.Found that according to calculate the rainfall efficiency of precipitation enhancement by 15%～25%,the average annual increase of 3.4～6.2 days for reaching the air quality standard.