ランドスケープ研究
Online ISSN : 1348-4559
Print ISSN : 1340-8984
ISSN-L : 1340-8984
研究論文
CGの樹木モデルを用いた単木落葉樹の木漏れ日の分布に関する数値解析
熊倉 永子中大窪 千晶梅干野 晁
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ジャーナル フリー

2012 年 75 巻 5 号 p. 403-406

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In order to develop a numerical tree model for calculating the effects of solar shading by a tree, it is important to focus on sunlight distribution, which is the light falling onto ground through the tree. Sunlight on the ground has not only a psychological impact but also a physical impact, such as increasing the surface temperature distribution. Thus, this paper discusses sunlight distribution on the ground through a numerical analysis of the differences between tree species, using CG tree models. Three deciduous tree species, with different crown shapes, were chosen. There are popular shade trees in Japanese streets. The sunlight ratio distribution of each tree was computed by the ray-tracing method on the summer solstice in Tokyo at 12:00 and 17:00. It is clear from this analysis that the tree’s geometrical shape, which depended on the species, created different tendencies of sunlight distribution on the ground at each solar altitude. The oval-shaped tree showed little change with the different solar altitudes. On the other hand, the cone-shaped and vase-shaped changed depending on solar altitude.

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© 2012 公益社団法人 日本造園学会
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