Abstract: To study influences of construction fugitive in Guiyang, construction fugitive PM₁₀emission in 2002 was estimated based on an extensive survey of construction activities in Guiyang. The contribution of construction fugitive dust to ambient PM₁₀was simulated using the CALPUFF model, and the seasonal variation as well as influencing factors were addressed. The results show that fugitive PM₁₀emission from construction activities was up to 416 tons, accounting for 4% of all PM10 source emissions in the urban area of Guiyang. Construction fugitive dust showed great impact on the ambient PM₁₀level in Guiyang, and contributed 12% to the annual mean concentration of PM₁₀over the urban area. Significant seasonal variation of the contribution of construction fugitive dust was found due to the change of construction activities and meteorological conditions ( wind and precipitation).

Key words: construction fugitive dust, Guiyang, CALPUFF, PM₁₀

摘要： 为了研究贵阳建筑扬尘的环境影响, 根据对建筑和市政施工工程的调查, 估算了贵阳市区2002 年建筑扬尘的PM₁₀排放量, 并利用 CALPUFF 模型模拟了建筑扬尘对PM10浓度的贡献, 分析了其季节变化及影响因素。结果表明, 2002 年贵阳城区建筑扬尘的PM₁₀排放量为416t, 占PM₁₀排放总量的4% 。建筑扬尘对贵阳市区较大范围内的PM₁₀浓度水平均有影响, 对整个城区 PM₁₀的年均浓度贡献接近12% 。受施工强度以及风场和降水等气象因素作用, 建筑扬尘排放的影响体现出明显的季节变化。

关键词: 建筑扬尘, 贵阳, CALPUFF, PM₁₀