Journal of the Korean Society of Environmental Restoration Technology (한국환경복원기술학회지)

The Korea Society of Environmental Restoration Technology (한국환경복원기술학회)
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Comparison of Planting Types on an Extensive Green Roof Based on Summer Surface Temperature

저관리 경량형 옥상녹화의 식재 유형별 여름철 표면온도 비교

  • Han, Yichae (Graduate school of Seoul Women's University) ;
  • Lee, Binara (Graduate school of Seoul Women's University) ;
  • Ahn, Geunyoung (Department of Horticulture Science and Landscape Architecture, Seoul Women's University) ;
  • Lee, Eun-Heui (Department of Horticulture Science and Landscape Architecture, Seoul Women's University)
  • 한이채 (서울여자대학교 일반대학원 원예학과) ;
  • 이빛나라 (서울여자대학교 일반대학원 원예학과) ;
  • 안근영 (서울여자대학교 원예생명조경학과) ;
  • 이은희 (서울여자대학교 원예생명조경학과)
  • Received : 2015.12.31
  • Accepted : 2016.03.29
  • Published : 2016.04.29
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Abstract

Significant efforts are being devoted in mitigating the urban heat island effect, and extensive green roofs are an option for mitigation. The purpose of this study was to compare the surface temperature, vegetation types, and plant species on an extensive green roof. Test beds were created in May 2015, and the surface temperature was monitored from June to August. The test beds comprised polyculture and monoculture. Polyculture was divided into three types, and monoculture comprised eight plant species. An extensive green roof is effective in reducing temperature by forming a shade and preventing sunlight from falling on the surface of buildings, which mitigates the urban heat island effect. Consequently, the surface temperature of the green roof and that of concrete during summer reduced from $17.8^{\circ}C$ to $7.3^{\circ}C$. The temperature reduction was greater on using polyculture than on using monoculture, but monocultures of Sedum takesimense, Hemerocallis dumortieri, Allium senescens, Aster yomena, Belamcanda chinensis, and Aster koraiensis also produced good results. The temperature reduction effects of Polygonatum odoratum var. pluriflorum f. variegatum, Phlox subulata, and Thymus quinquecostatus var. japonica were excellent compared with those of concrete but were less than those of other plant species. Careful attention is needed for the management of extensive green roofs. Studies on the plant species and types of extensive green roof should continue to mitigate the urban heat island effect.

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References

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