两种计算扩散参数方案的对比研究

Comparisons of Two Schemes for Calculating Diffusion Parameters

利用由泰勒公式导出的Hay-Pasquill方法和Draxler经验公式方法,处理了双向风标风速仪的观测资料,计算并分析了兰州郊区皋兰县的扩散参数.结果表明,Hay-Pasquill方法的计算结果较Draxler经验公式方法稍大,皋兰地区的扩散参数比Briggs开阔平原地区的扩散曲线高2～3个稳定度级。

Using H-P method and Draxler empirical formula reduced from Taylor formula, we calculated and analysed the diffusion parameters in Gaolan, the suburb county of Lanzhou. It is shown that diffusion parameters calculated by H-P method are a little bigger than those by Draxler empirical formula; and the diffusion parameters are bigger than Briggs diffusion parameters under open-country conditions by 2-3 grades.