用风脉动资料确定低山丘陵地区大气扩散参数的研究

Study on Atmospheric Diffusion Parameters of Hilly Areas by Wind Fluctuation Data

本文利用若干次低山丘陵地区的Ｇｉｌｌ双向风标风速仪资料，按Ｈａｙ－Ｐａｓｑｕｉｌｌ方法计算了此类地区的大气扩散参数，讨论了其特征及其与Ｐ－Ｇ扩散参数的差别．发现低山丘陵地区的各级别扩散曲线间截距差比Ｐ－Ｇ曲线的小很多；曲线的斜率也比Ｐ－Ｇ曲线的小．σｙ在稳定和中性情况下，比Ｐ－Ｇ曲线高２－３级；在不稳定条件下，高１－２级，σｚ在稳定和中性情况下，高１．５级；不稳定情况下，平均高１级。

Based on a series of data collected by Gill bivance anemometer the atmospheric diffusion parameters of hilly areas are estimated by the Hay-Pasquill method, and the difference between the estimation and the P-G diffusion curves is also discussed. It shows that the nodal increment difference of the diffusion curves in the areas is much smaller in comparison with that of P-G diffusion curves, and the slope of the diffusion curves is again smaller than that of the P-G diffusion curves. In a neutral and stable situation the σy curves are 2￣3 classes higher than the P-G curves while 1￣2 classes higher in an unstable situation. The σz.curves are 1. 5 classes higher in a stable and neutral situation and the average increase is one class in an unstable situation.