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

作　　者：张镭[1] 王世红[1] 任健美[1] 张武[1] 陈长和[1] 

机构地区：[1]兰州大学大气科学系,山西大学师院地理系

出　　处：《兰州大学学报（自然科学版）》1994年第4期152-156,共5页Journal of Lanzhou University(Natural Sciences)

基　　金：甘肃省环境科学基金

摘　　要：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.

关 键 词：大气环境 大气扩散 H-P法 风脉动 复杂地形 

分 类 号：X16[环境科学与工程—环境科学]