四维通量法施工扬尘排放模型的建立与应用

Establishment and Application of Four-dimensional Fluxes Emission Factor Model for Construction Fugitive Dust

建立了一种与美国环保局推荐的暴露高度浓度剖面法类似、应用实测数据计算施工扬尘排放量的数学模型——四维通量法模型,以及一套与该模型相匹配的施工扬尘排放量监测方案.采用四维通量法计算施工扬尘排放量,更加简洁方便,并且可以较好地消除偶然因素对计算结果的干扰.将北京城近郊区40多个建筑工地的实测数据代入该数学模型所得到的北京市施工扬尘中TSP排放因子为0.492 kg/(m2.30 d),在数值上是美国环保局AP-42文件推荐排放因子的1.83倍.建议采用本研究得出的本地化排放因子来建立北京市施工扬尘排放清单.

We established a four-dimensional fluxes mathematics model and a suit of relevant monitoring project that can calculate construction fugitive dust emission according to actual field monitoring data, this mathematics model is similar to exposure profiling method recommended by U. S. EPA. Four-dimensional fluxes mathematics model is simpler and more convenient to calculate construction fugitive dust emission, and it can preferably eliminate the influence of incidental factors on calculation result. Actual field monitoring data from forty construction sites of Beijing were inputted into the model to calculate TSP emission factor among construction fugitive dust of Beijing local which equaled to 0.492 kg/（m^2 · 30 d）. By comparing emission factor of Beijing and U. S. EPA＇s AP-42 documents, we found the ratio between Beijing＇ s and U.S. EPA＇s emission factor value was 1.83. Beijing local emission factor from this paper is recommended to establish construction fugitive dust emission inventory of Beijing.