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http://dx.doi.org/10.13087/kosert.2018.21.6.1

Estimating the urban radiation heat flux distribution and the reduction effect of building and tree shade  

Park, Chae-Yeon (Interdisciplinary Program in Landscape Architecture, Seoul National University)
Lee, Dong-Kun (Department of Landscape Architecture and Rural system Engineering, Seoul National University)
Yoon, June-Ha (Department of Landscape Architecture and Rural system Engineering, Seoul National University)
Publication Information
Journal of the Korean Society of Environmental Restoration Technology / v.21, no.6, 2018 , pp. 1-13 More about this Journal
Abstract
Mapping radiation heat flux of urban area is essential for urban design and landscape planning. Because controlling urban geometry and generating green space are important urban design strategies for reducing urban heat, urban planner and designer need to recognize the micro urban heat distribution for adequate urban planning. This study suggests a new methodology for mapping urban radiation heat flux in a micro scale considering buildings and trees' shade. For doing that, firstly, we calculate net radiation for each urban surfaces (building, road (not shaded, building shaded, tree shaded), ground (not shaded, building shaded, tree shaded), tree (not shaded, building shaded)). Then, by multiplying the area ratio of surfaces to the net radiation, we can obtain the radiation heat flux in micro-scale. The estimated net radiation results were found to be robust with a $R^2$ of 90%, which indicates a strong explanatory power of the model. The radiation heat flux map for 12h $17^{th}$ August explains that areas under the building and tree have lower net radiation heat flux, indicating that shading is a good strategy for reducing incident radiation. This method can be used for developing thermal friendly urban plan.
Keywords
urban heat island; shading effect; spatial distribution; urban planning; tree planning;
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Times Cited By KSCI : 2  (Citation Analysis)
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