宁夏盐池通用机场预选场址气象条件可行性分析

Meteorological conditions analysis of proposed site for the Yanchi general airport in Ningxia

利用气象站近10年逐时和逐日气象观测资料,对盐池通用机场预选场址的风速、风向频率、温度、降水,以及低能见度、低云、沙尘、雷暴、积雪、大风、冰雹等影响机场场址选择的天气气候条件进行了分析.结果表明,盐池通用机场预选场址区域具有年平均风速低,风向季节变化规律明显,年静风频率高的气候特点.全年各月平均风速在2.1~3.0 m/s,风向以WSW,W,WNW和SSE为主,累计频率超过30%.0.0~5.0 m/s风速等级风和静风的累计频率达90.6%.整个机场预选场址区域低能见度日数少,能见度好;出现小于800 m,800 m^2 km,2~4 km的能见度天气的年平均日数分别为2.7,2.9,2.0 d;大风、雷暴、冰雹、闪电、沙尘暴等天气年平均日数分别为13.2,17.2,0.3,10.8,13.4 d.总体而言,整个预选场址具备建设通用机场的优良的天气气候条件,非常有利于该通用机场工程的设计及将来的安全运行.

Weather conditions, such as wind speed, wind direction frequency, air temperature, precipitation, and low visibility, low clouds, dust, thunderstorms, snow and more, which influences the proposed site for Yanchi general airport are analyzed by using the daily and hourly observational data of weather station. The results show that, the proposed site of Yanchi general airport have characteristics of low annual average wind speed, significant seasonal variation of wind direction, high static wind frequency. Annual average wind speed in each month is range from 2.1 to 3.0 m/s. The WSW, W, WNW and SSE are the prevailing wind direction for the proposed site, which acumulative frequency is more than 30%. The 0.0-5.0 m/s level wind and static wind＇s cumulative frequency is 90.6%. The proposed general airport site have less days of low visibility and visibility is good. The annual average days are 2.7 days , 2.9 days and 2.0 days for visibilitie less than 800 m, 800 m-2 km and 2-4km, respectively. The annual average number of days for gale, thunderstorm, hail, lightning, dust storm is respectively 13.4, 13.2, 17.2, 0.3, 10.8 days. Overall, the proposed site have an excellent weather and climate conditions for general airport engineering design, constructing and safely operating in the future.