摘要
地面所接收到的太阳直接辐射量是随地面的纬度、高程、坡度、坡向以及地形遮蔽等地形因子的变化而变化的。本文基于GIS技术,利用DEM获取地形因子,在GIS中建立了晴空太阳直接辐射模型。本模型的计算结果准确率达到90%,可应用于农业、林业、生物、生态等领域。
Clear sky solar radiation varies in response to latitude,elevation, surface gradient (slope) and orientation (aspect), as well as position relative to neighbouring surfaces. This paper presents a model for estimating daily direct solar radiation. The model is based on technology and theory of GIS, using DEM to caculate slope, aspect and shading. Compared with measured radiation in the south of Ningxia Hui Autonomous Region, the results of the model is in a high degree of accuracy and can be used in the fields of forestry, ecology, biology and agriculture.
出处
《林业科学研究》
CSCD
北大核心
2003年第1期8-12,共5页
Forest Research
基金
国家948项目"INSAR自动生成DEM技术的引进"(99 4 25)
