山东省不同下垫面大气扩散参数的对比分析

利用在山东各地进行的多次建设项目大气环境影响评价中的大气扩散试验结果，对不同垫面的大气扩散参数做对比分析，讨论下垫面的变化对大气扩散参数的影响以及大气扩散能力与大气污染物浓度分布的关系，试验均采用平衡法进行。结果表明：不同地形下的大气扩散参数有明显差异。与国际扩散参数值相比，山区比平原高０．５－１级，平原地区与国标基本一致，工业区模向扩散参数与国标基本相当，垂直扩散参数１个级别以上；沿海地区横向扩

The Atmospheric Diffusion Parameter in Various Terrain in Comparison with Each Other in Shandong Province

Analysing the experimental result in Shandong province,it is found that the atmospheric diffusion parameters vary obviously with terrain.The diffusion parameters are about as big as that of national standard in the plain and half to one class bigger than it in the mountain areas.In industrial park the cross wind diffusion parameter is about the same as while the vertical one is one more class bigger than that of national standard.In coastal areas the cross wind parameter is bigger slightly and the vertical one is smaller slightly than that of national standard.The pollutant diffusion density and the air diffusiophoretic velocity are related directly to the diffusion parameter.