Journal of the Korean Association of Geographic Information Studies (한국지리정보학회지)

The Korean Association of Geographic Information Studies (한국지리정보학회)
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Analysis of Thermal Environment Characteristics by Spatial Type using UAV and ENVI-met

UAV와 ENVI-met을 활용한 공간 유형별 열환경 특성 분석

  • KIM, Seoung-Hyeon (Dept. of Smart Ocean Environmental Energy, Changwon National University) ;
  • PARK, Kyung-Hun (School of Civil, Environmental and Chemical Engineering, Changwon National University) ;
  • LEE, Su-Ah (Dept. of Environmental Engineering, Changwon National University) ;
  • SONG, Bong-Geun (Institute of Industrial Technology, Changwon National University)
  • 김성현 (창원대학교 스마트환경에너지공학협동과정) ;
  • 박경훈 (창원대학교 토목환경화공융합공학부) ;
  • 이수아 (창원대학교 환경공학과) ;
  • 송봉근 (창원대학교 산업기술연구원)
  • Received : 2022.01.21
  • Accepted : 2022.02.11
  • Published : 2022.03.31
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Abstract

This study classified UAV image-based physical spatial types for parks in urban areas of Changwon City and analyzed thermal comfort characteristics according to physical spatial types by comparing them with ENVI-met thermal comfort results. Physical spatial types were classified into four types according to UAV-based NDVI and SVF characteristics. As a result of ENVI-met thermal comfort, the TMRT difference between the tree-dense area and other areas was up to 30℃ or more, and it was 19. 6℃ at 16:00, which was the largest during the afternoon. As a result of analyzing UAV-based physical spatial types and thermal comfort characteristics by time period, it was confirmed that the physical spatial types with high NDVI and high SVF showed a similar to thermal comfort change patterns by time when using UAV, and the physical spatial types with dense trees and artificial structures showed a low correlation to thermal comfort change patterns by time when using UAV. In conclusion, the possibility of identifying the distribution of thermal comfort based on UAV images was confirmed for the spatial type consisting of open and vegetation, and the area adjacent to the trees was found to be more thermally pleasant than the open area. Therefore, in the urban planning stage, it is necessary to create an open space in consideration of natural covering materials such as grass and trees, and when using artificial covering materials, it is judged that spatial planning should be done considering the proximity to trees and buildings. In the future, it is judged that it will be possible to quickly and accurately identify urban climate phenomena and establish urban planning considering thermal comfort through ground LIDAR and In-situ measurement-based UAV image correction.

본 연구는 창원시 도시지역 내 공원을 대상으로 UAV 영상 기반 물리적 공간 유형을 분류하고, ENVI-met 열 쾌적성 결과와의 비교를 통해 물리적 공간 유형에 따른 열 쾌적성 특성을 분석하였다. 물리적 공간 유형은 UAV 기반 NDVI, SVF 특성에 따라 4개 유형으로 분류하였다. ENVI-met 열 쾌적성 결과는 수목 밀집지역의 TMRT가 그 외 지역보다 최대 30℃ 이상의 차이를 보였으며, 오후 시간대 중에서는 수목 밀집지역과 다른 지역의 TMRT 차이가 16시에 19.6℃로 가장 큰 것으로 나타났다. UAV 기반 물리적 공간 유형과 시간대별 열 쾌적성 특성 분석결과 NDVI가 높고, SVF가 높은 공간 유형에 대해 UAV 활용 시 시간대별 열 쾌적성 변화 패턴과 유사한 경향을 보이는 것을 확인하였으나, 수목 및 인공 구조물 등이 밀집된 지역에 대해서는 상대적으로 UAV 기반 물리적 환경 유형과 상관관계가 낮은 것으로 나타났다. 결론적으로 개활지 및 식생으로 이루어진 공간 유형에 대해 UAV 영상 기반 열 쾌적성 분포 파악 가능성을 확인하였으며, 수목 인접지역이 개활지보다 열적으로 쾌적한 것으로 도출되었다. 따라서, 도시계획 단계에서 개활 공간은 잔디 및 수목 등 자연피복재질을 고려하여 조성할 필요가 있으며, 인공피복재질 활용 시 수목, 건물과의 인접성 등을 고려한 공간계획이 이루어져야 할 것으로 판단된다. 향후 지상LiDAR 및 현장 측정 기반 UAV 영상 보정을 통해 신속·정확한 도시기후 현상 규명 및 열 쾌적성을 고려한 도시계획 수립이 가능할 것으로 판단된다.

Keywords

Acknowledgement

본 연구는 2019년도 정부(교육부)의 재원으로 한국연구재단의 지원을 받아 수행된 기초 연구사업이며(No. NRF-2019R1I1A1A01063568), 환경부의 폐자원에너지화 재활용 전문인력 양성사업으로부터 지원을 받았습니다(YL-WE-19-001).

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