Mitigating the Urban Heat Island Effect by Light and Thin Rooftop Greening
Mitigating the Urban Heat Island Effect by Light and Thin Rooftop Greening
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轻薄屋顶绿化缓解城市热岛效应
DOI：
10.5632/jila.68.509
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发表时间：
2005
影响因子：
6.7
通讯作者：
K. Ishii
中科院分区：
文献类型：
--
作者：
Takako Yamaguchi;H. Yokoyama;K. Ishii
对既有建筑屋顶轻薄绿化缓解城市热岛效应进行了主要列举。在既有建筑屋顶上设置了6种轻薄型屋顶绿化系统，并对其热特性和热平衡进行了分析。非绿化区表面温度最高，为60°C。定期灌溉时绿化区地表温度为30-35°C，减少灌溉时为35-45°C。在累积蒸散量方面，减少灌溉时，牧草面积约为3 kg/m²，而墨西哥景天布里顿面积为0.4- 2.0kg/m²。热量平衡分析结果表明，在绿化系统中，蒸散潜热的消耗主要是为了防止显热的增加。从以上结果可以看出，屋顶绿化的轻薄化对缓解城市热岛效应有一定的效果。证实屋顶绿化缓解城市热岛效应在植物种类、水分条件等方面存在差异。
A main enumeration was carried out for mitigating the urban heat island effect by light and thin rooftop greening at the existent building. Six kinds of light and thin rooftop greening systems were installed on the existent building roof, and those heat characteristic and heat balance were analyzed. Surface temperature of the non-greening area was the highest, 60°C. Surface temperature of greening area was 30-35°C in the time when the irrigation was done regularly, and it was 35-45°C in the time when the irrigation was reduced. About accumulated evapotranspiration, in the time when the irrigation was reduced, Grass area was about 3kg/m², but Sedum Mexicanum Britton area was 0.4-2.0 kg/m². The results of heat balance analysis show the latent heat consumption of evapotranspiration at greening system to prevent increase sensible heat. It became clear that light and thin rooftop greening had effect of mitigating the urban heat island effect from the above result. It confirmed that mitigating the urban heat island effect by rooftop greening varied in the kind of plant, water condition and so on.