典型沿海丘陵地区风场变化特性实测研究

Experimental Study on Wind Field Variation Characteristics in Typical Coastal Hilly Area

针对沿海丘陵地区的风场变化特性,采用新型激光测风雷达配合手持自动气象站,对奉化黄贤村进行了设点气象数据的采集,并结合当地气象站的测风数据进行统计分析,在此基础上,研究了当地风速,风向随时间及地势变化的特征。结果表明,该地区沿海地带风速变化具有日周期性,风速风向变化规律受海陆风影响较大,丘陵地带风速风向受风速等级,地形及建筑布局影响较大。同时,基于测点处50~1000 m高度范围的雷达数据,对近地层风切变指数α进行了计算和分析,发现丘陵地带入口处α值受主导风向影响,与我国其它丘陵地区观测值有所差异。

According to the characteristics of wind field variation in Typical Coastal Hilly Area,a new type of laser wind radar combined with handheld automatic weather station is used to collect the meteorological data of Huangxian village in Fenghua,and combined with the wind data of local weather station,the statistical analysis is carried out,on this basis,the variation characteristics of local wind speed and direction with time and terrain are studied.The results show that the variation of wind speed in coastal area is daily periodic,and the variation of wind speed and direction is greatly affected by land and sea wind,and the wind speed and direction in hilly area is greatly affected by wind speed grade,terrain and building layout.At the same time,based on the radar data within the height range of 50~1000 m,the wind shear indexαis calculated and analyzed,and it is found that theαvalue at the entrance of the hilly area is affected by the dominant wind direction,which is different from that observed in other hilly areas in China.