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地形对风速的影响中,“狭管效应”是重要的一部分,但据作者搜集,尚未见有简明的具体计算方法。本文利用山西省山高谷深的特殊地形条件,分析形成狭管效应”的因素,考虑计算要求,严格地按要求选择了八对在沟谷地区设置的气象观测站,统计顺/逆谷方向两对年最大风速系列,求得每一对比站两个方向同风向两个对比风速差值,以两个差值之平均值与沟谷特征综合指标建立相关关系,其相关系数达0.86。据此,可估算沟谷对最大风速增速的影响,以供沟谷地区工程设计中沟谷对顺沟方向最大风速影响量估算的参考。
The effect of topography on the wind speed, the “narrow-tube effect” is an important part, but according to the author to collect, yet there is no concise concrete calculation method. In this paper, we use the special terrain conditions of mountainous and deep valleys in Shanxi Province to analyze the factors that cause the formation of the narrow-tube effect. Considering the calculation requirements, eight pairs of meteorological stations are set up strictly according to the requirements in the valleys and valleys, Annual maximum wind speed series, the wind speed difference of two contrasting wind directions in each direction of two contrasting stations is calculated, and the correlation between the average value of the two differences and the comprehensive indicator of valley characteristics is established, and the correlation coefficient reaches 0.86. Estimating the influence of valleys on the maximum wind speed growth is a reference for estimating the influence of the valleys on the maximum wind speed along the ditch in engineering design in the valley area.