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2020 Vol.7, Issue 4

Original Article

Human Thermal Environment Analysis with Local Climate Zones and Surface Types in the Summer Nighttime - Homesil Residential Development District, Suwon-si, Gyeonggi-do

Local Climate Zone과 토지피복에 따른 여름철 야간의 인간 열환경 분석 - 경기도 수원시 호매실 택지개발지구

Hak-Yang Kong1
,
Nakhoon Choi2
,
Sookuk Park3*
공 학양1
,
최 낙훈2
,
박 수국3*
1Researcher, Department of Environment Research Division, National Institute of Environmental Research, Incheon 22689, Korea
2Researcher, Department of Environment Research Division, National Institute of Environmental Research, Incheon 22689, Korea
3Professor, Research Institute for Subtropical Agriculture and Animal Biotechnology, SARI, Horticultural Science, College of Applied Life Sciences, Jeju National University, Jeju 63243, Korea
1국립환경과학원 환경자원연구부 자연환경연구과 환경연구사
2국립환경과학원 환경자원연구부 자연환경연구과 전문위원
3제주대학교 생명자원과학대학 생물산업학부 원예환경전공 교수
*Corresponding Author
31 December 2020. pp. 227-237
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Abstract

Microclimatic data were measured, and the human thermal sensation was analyzed at 10 local climate zones based on the major land cover classification to investigate the thermal environment of urban areas during summer nighttime. From the results, the green infrastructure areas (GNIAs) showed an average air temperature of 1.6°C and up to 2.4°C lower air temperature than the gray infrastructure areas (GYIAs), and the GNIAs showed an average relative humidity of 9.0% and up to 15.0% higher relative humidity. The wind speed of the GNIAs and GYIAs had minimal difference and showed no significance at all locations, except for the forest location, which had the lowest wind speed owing to the influence of trees. The local winds and the surface roughness, which was determined based on the heights of buildings and trees, appeared to be the main factors that influenced wind speed. At the mean radiant temperature, the forest location showed the maximum value, owing to the influence of trees. Except at the forest location, the GNIAs showed an average decrease of 5.5°C compared to GYIAs. The main factor that influenced the mean radiant temperature was the sky view factor. In the analysis of the human thermal sensation, the GNIAs showed a “neutral” thermal perception level that was neither hot nor cold, and the GYIAs showed a “slightly warm” level, which was a level higher than those of the GNIAs. The GNIAs showed a 3.2°C decrease compared to the GYIAs, except at the highest forest location, which indicated a half-level improvement in the human thermal environment.

Keywords
Green infrastructure
LCZ
Nighttime
PET
Thermal environment
Urban area

도시지역의 여름철 밤 시간대 열환경을 알아보기 위해, 토지피복 대분류에 따라 10개의 도시기후지역 지점에서 미기후 자료를 측정하여 인간 열환경지수를 분석하여 보았다. 미기후 요소 비교 분석 결과, 그린인프라 지역이 그레이인프라 지역보다 기온에서는 평균 1.6°C 최대 2.4°C 낮은 결과를 보였으며, 상대습도에서는 반대로 그린인프라 지역이 평균 9.0% 최대 15.0% 높은 결과를 보였다. 풍속에서는 그린인프라 지역과 그레이인프라 지역에서 차이가 거의 없는 것으로 나타났으며, 수목의 영향으로 가장 낮은 풍속을 보인 산림지점을 제외하고는 모든 지점에서 유의성이 없는 것으로 나타나, 건물이나 수목의 높이에 의해 결정되는 표면거칠기 뿐만 아니라 지역풍의 영향이 풍속을 결정하는 주 요인인 것으로 보인다. 평균복사온도에서는 수목의 영향으로 산림지역이 가장 높은 값을 보였으며, 산림지역을 제외하면 그린인프라 지역이 그레이인프라 지역에 비해 평균 5.5°C의 저감 효과를 보였다. 평균복사온도를 결정하는 주 요인으로는 하늘시계지수라고 할 수 있다. 인간 열환경지수 분석에서는 그린인프라 지역은 거의 덥지도 춥지도 않는 ‘중립’의 열지각 단계를 나타내었으며, 그레이인프라 지역은 그것보다 한 단계 높은 ‘약간 따뜻함’의 단계를 나타내었다. 가장 높게 나온 산림지역을 제외하면, 그린인프라 지역이 그레이인프라 지역에 비해 3.2°C 저감 효과를 보여 1/2 단계의 인간 열환경 개선 효과가 있는 것으로 나타났다.

키워드
생리등가온도
도시기후지역
밤 시간대
그린인프라
열환경
도시지역
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Information
  • Publisher :Korean Society of Ecology and Infrastructure Engineering
  • Publisher(Ko) :응용생태공학회
  • Journal Title :Ecology and Resilient Infrastructure
  • Journal Title(Ko) :응용생태공학회 논문집
  • Volume : 7
  • No :4
  • Pages :227-237
  • Received Date : 2020-06-11
  • Revised Date : 2020-12-07
  • Accepted Date : 2020-12-10
  • DOI :https://doi.org/10.17820/eri.2020.7.4.227
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