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利用光散射法对盛夏时节成都市区空气中的风尘浓度及分散度进行了测试，并就风尘的粒径分布及分散度的统计模式、气象参数时飘尘浓度的影响，以及飘尘浓度和分散度的日变化进行了分析。结果表明：成都市区空气中飘尘的大多数粒径分布的统计模式为Ｊｕｎｇｅ分布，峰值浓度出现在中午１２：００前后，相对湿度对空气中飘尘浓度影响显著，降雨对风尘有明显的清除作用。测试结果对评价城市环境卫生条件和分析人类活动对环境的干扰情况有参考价值。
The concentration and dispersity of airborne dust in the air in the urban area in midsummer were tested by light scattering method. The effects of airborne dust concentration and dispersion on the particle size distribution and statistical model of airborne dust, the concentration of fly ash in meteorological parameters, The diurnal changes were analyzed. The results show that the statistical distribution of the most particle size distribution of airborne dust in the urban area of Chengdu is Junge distribution. The peak concentration occurs around 12:00 in the morning. Relative humidity has a significant effect on the concentration of fly ash in the air. . The test results have reference value for evaluating urban environmental sanitation and analyzing the interference of human activities to the environment.