Spatial Information Research

Korea Spatial Information Society (대한공간정보학회)
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Spatial Analysis of the Urban Heat Island Using a 3-D City Model

3차원 도시모형을 이용한 도시열섬의 공간분석

  • Received : 2012.01.30
  • Accepted : 2012.07.25
  • Published : 2012.08.31
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Abstract

There is no doubt that the urban heat island (UHI) is a mounting problem in built-up environments, due to energy retention by the surface materials of dense buildings, leading to increased temperatures, air pollution, and energy consumption. To investigate the UHI, three-dimensional (3-D) information is necessary to analyze complex sites, including dense building clusters. In this research, 3-D building geometry information is combined with two-dimensional (2-D) urban surface information to examine the relationship between urban characteristics and temperature. In addition, this research introduces spatial regression models to account for the spatial spillover effects of urban temperatures, and includes the following steps: (a) estimating urban temperatures, (b) developing a 3-D city model, (c) generating urban parameters, and (d) conducting statistical analyses using both Ordinary Least-Squares (OLS) and Spatial Regression Models. The results demonstrate that 3-D urban characteristics greatly affect temperatures and that neighborhood effects are critical in explaining temperature variations. Finally, the implications of the results are discussed, providing guidelines for policies to reduce the UHI.

도시열섬 현상은 도심지의 가장 큰 환경문제로 대두되고 있으며, 이는 온도상승, 대기오염, 에너지 수요에 영향을 준다. 이러한 열섬현상에 대하여 많은 건물과 복잡한 공간적/입체적 패턴을 가진 지역의 경우에는 3차원 분석이 전적으로 수행되어야 한다. 본 연구는 2차원자료와 3차원 공간자료를 이용하여 도시열섬 인자를 파악함에 있다. 또한 공간 통계기법을 이용하여 열섬인자들의 공간적 영향력을 추출한다. 따라서, 도시온도의 예측, 3차원 모델의 생성, 도시인자의 추출, 일반회귀모형과 공간회귀모형의 구축을 통하여 본 연구를 수행한다. 결과적으로 3차원 도시인자와 인접한 공간영향력들이 도시열섬 현상에 미치는 효과는 크다는 것을 확인할 수 있다. 이를 바탕으로 도시온도 저감을 위한 정책수립에 방향을 효과적으로 제시할 수 있을 것이다.

Keywords

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