夏季南京雨花台景区不同绿地类型与大气污染的关系

摘要

The different structure types of green space were selected to conduct community surveys in the Nanjing Yuhuatai area.The types of green space include non-forest land,lawn,savanna,road green space and jungle land.According to the characteristics of air pollution in Nanjing,SO2,NO2 and PM10 in the height of 1.5 m from the ground were selected to survey and analyze the relationships between the different green spaces and the atmospheric pollutions in two different weather,sunny and rainy days.The results showed that:The concentrations of SO2 and NO2 comply with the first grade level of national ＜Ambient Air Quality Standard＞ (GB 3095-1996) in Nanjing Yuhuatai area in summer.The concentration of PM10 complies with the state's secondary standard.On sunny days,the concentrations of SO2,NO2 and PM10 show significant differences in different green types,non-forest land＞road green space＞jungle land.On rainy days,because of the precipitation purification to air pollutants,green space has little obvious influence on the air pollutant.%在南京雨花台景区内,选取不同结构的绿地类型进行群落调查,包括无林地、草坪、疏林草地、道路绿地及密林地.针对南京大气污染的特点,在夏季的晴天和雨天两种不同天气情况下,对不同绿地进行离地面1.5m高大气SO2、NO2及可吸入颗粒物(PM10)质量浓度的测定,分析绿地与大气污染的关系.结果表明:雨花台景区大气中的SO2和NO2质量浓度均符合国家《环境空气质量标准》(GB 3095-1996)中的一级标准,PM 10的质量浓度符合国家的二级标准；晴天,不同绿地类型下,大气污染物SO2、NO2及PM10的质量浓度差异显著,无林地＞乔灌结构的道路绿地＞乔灌草结构的密林地,乔灌草复层结构类型的绿地环境效应最佳;雨天,由于降水对大气污染物的净化作用,绿地对大气污染物的影响不明显.