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http://dx.doi.org/10.11108/kagis.2018.21.4.026

Radiation Flux Impact in High Density Residential Areas - A Case Study from Jungnang area, Seoul -  

YI, Chae-Yeon (Research Center for Atmospheric Environment, Hankuk University of Foreign Studies)
KWON, Hyuk-Gi (Research Center for Atmospheric Environment, Hankuk University of Foreign Studies)
Lindberg, Fredrik (Dept. of Earth Sciences, University of Gothenburg)
Publication Information
Journal of the Korean Association of Geographic Information Studies / v.21, no.4, 2018 , pp. 26-49 More about this Journal
Abstract
The purpose of this study was to verify the reliability of the solar radiation model and discuss its applicability to the urban area of Seoul for summer heat stress mitigation. We extended the study area closer to the city scale and enhanced the spatial resolution sufficiently to determine pedestrian-level urban radiance. The domain was a $4km^2$ residential area with high-rise building sites. Radiance modelling (SOLWEIG) was performed with LiDAR (Light Detection and Ranging)-based detailed geomorphological land cover shape. The radiance model was evaluated using surface energy balance (SEB) observations. The model showed the highest accuracy on a clear day in summer. When the mean radiation temperature (MRT) was simulated, the highest value was for a low-rise building area and road surface with a low shadow effect. On the other hand, for high-rise buildings and vegetated areas, the effect of shadows was large and showed a relatively low value of mean radiation temperature. The method proposed in this study exhibits high reliability for the management of heat stress in urban areas at pedestrian height. It is applicable for many urban micro-climate management functions related to natural and artificial urban settings; for example, when a new urban infrastructure is planned.
Keywords
mean radiant temperature; sky view factor; SOLWEIG model; surface energy balance; urban radiant flux;
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Times Cited By KSCI : 3  (Citation Analysis)
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