DOI: 10.5176/2301-394X_ACE14.71
Authors: Lin Chuang-Hung, Huang Yao-Ching, Hsu Cheng-Yuan
Abstract:
This study reports on the effects of building shadows on trees in Metropolis. The site included the open space where “New Taipei City Government” is located, which is a building of 33 stories. We analyzed the changes of surrounding sunlight shadows caused by the high-rise building group in different seasons using computer simulation, and discussed the effects of light environments on the surrounding open space. From the RSH of the measured points, it can be seen that the minimum and maximum relative sunshine hours (RSH, {6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465}) of Chinese fan palms is 0{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} and 91{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465}, respectively, at spring and autumnal equinoxes, 7{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} and 100{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} on summer solstice, and 0{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} and 76{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} on winter solstice; which indicates the same type of tree in the same block has great sunshine environment differences due to shadow by buildings. The results show that symmetric design plaza fails to be time-specific. Besides, it is suggested that more arbors shall be planted in order to reduce the urban heat island effect and provide more comfortable outdoor environments for people. This study could serve as reference for urban designers to create various eco-city images and help to predict the influence of existing designs on the growth of urban trees.
Keywords: building shadow； relative sunshine hours (RSH)； planting design
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