摘要
据我们1982—1983年在北京的观测,夏季居住区绿化具有良好的辐射效益。随着楼区乔木覆盖度的增加,庭院地面获得的直接辐射、漫射辐射、总辐射和辐射平衡均逐渐减小。居住楼区乔木覆盖度以小于0.7为宜,这时地面接受的太阳辐射日总量约减少三分之一,辐射平衡将减小一半左右。
Observations made in 1982-1983 in Beijing indicate that tree and plant planting around the dormitory buildings would reduce direct radia-fion, diffused radiation, general radiation and radiation balance on the earth s surface in summer season. A coverage less than 0.7 is considered; to be appropriate in the residential quarters, thus the total daily solar radiation may be decreased by one third, and radiation balance dropped half as much on the surface ground,
