Journal of Korea Planning Association (국토계획)

Korea Planning Association (대한국토도시계획학회)
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Analysis of the Relationship between Three-Dimensional Built Environment and Urban Surface Temperature

도시의 3차원 물리적 환경변수와 지표온도의 관계 분석

  • Li, Yige (Dept. of Urban Planning & Engineering, Hanyang University) ;
  • Lee, Sugie (Dept. of Urban Planning & Engineering, Hanyang University) ;
  • Han, Jaewon (Dept. of Urban Planning & Engineering, Hanyang University)
  • Received : 2018.07.25
  • Accepted : 2019.02.12
  • Published : 2019.04.30
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Abstract

This study examines the relationship between three-dimensional urban built environment and urban surface temperature using LANDSAT 8 satellite image data in Seoul city. The image was divided into 600m×600m grid units as an unit of analysis. Due to the high level of spatial dependency in surface temperature, this study uses spatial statistics to take into account spatial auto-correlation. The spatial error model shows the best goodness of fit. The analysis results show that the three-dimensional built environment and transport environment as well as natural environment have statistically significant associations with surface temperature. First, natural environment variables such as green space, streams and river, and average elevation show statistically significant negative association with surface temperature. Second, the building area shows a positive association with surface temperature. In addition, while sky view factor (SVF) has a positive association with surface temperature, surface roughness (SR) shows a negative association with it. Third, transportation related variables such as road density, railway density, and traffic volume show positive associations with surface temperature. Moreover, this study finds that SVF and SR have different effects on surface temperature in regard to the levels of total floor areas in built environment. The results indicate that interactions between floor area ratio (FAR) and three-dimensional built environmental variables such as SVF and SR should be considered to reduce urban surface temperature.

Keywords

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