起伏地形日照时数的计算方法

[目的]研究计算起伏地形日照时数的方法,为农业作物布局、日光温室设计服务。[方法]选择户子沟为试验点,实地测量周围起伏地形的仰角、方位角、时角等,绘制太阳视轨道图,应用太阳视轨道方程,计算出晨蔽、昏蔽太阳高度角,进而计算出日照时数。[结果]在周边起伏地形的影响下,4~9月户子沟日照时数为1 069.3 h,仅为平地的71.3%。[结论]应用太阳视轨道方程计算起伏地形的日照时数可提高光能利用率,为农业生产服务。

Calculation Method of Sunshine Hours under Undulating Terrain

[Objective] The research aimed to study the calculation methods of sunshine hours under undulating terrain and service for the layout of agricultural crops and the solar greenhouse design.[Method] Choosing Huzigou as the experimental site,the elevation,azimuth,hour angle and so on of the surrounding undulating terrain was measured.The solar visual orbit map was developed and the solar visual orbit equation was applied to calculate the solar elevation angle of morning shelter and dark shelter and the sunshin...