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Effect of urban vegetation on outdoor thermal environment: Field measurement at a scale model site

机译：城市植被对室外热环境的影响：比例模型现场的实地测量

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摘要

The goal of this research is to bridge the gap between numerical studies and field measurements on thermal environment of a real urban street and to present information on the effects of urban vegetation suitable for use by designers and planners. Outdoor measurements were conducted at a scale model site consisting of an array of concrete cubes each 1.5 m high. Eight urban street units with various vegetation conditions were reproduced to examine the quantitative effects of vegetation along the sidewalk and in median strips on the thermal environment in summer. The results can be summarized as follows. The presence of four sidewalk trees reduces the wind speed inside the canopy by up to 51%. Trees along the sidewalk also decrease the globe temperature; the reduction is attributed mainly to the decrease in radiation flux resulting from the shade they cast. Moreover, thermal mitigation due to vegetation persists even when an area is shaded. In contrast, the mitigating effect of a vegetated median strip is not remarkable. A sidewalk facing a southwestern wall exhibited the most significant thermal mitigation.
机译：这项研究的目的是弥合数值研究和实地街道热环境实地测量之间的差距，并提供有关适合设计师和规划者使用的城市植被影响的信息。在比例模型现场进行室外测量，该比例模型现场由高1.5 m的一系列混凝土立方体组成。复制了八个具有不同植被条件的城市街道单元，以检查沿人行道和中间带的植被对夏季热环境的定量影响。结果可以总结如下。四棵人行道树木的存在使冠层内部的风速降低了51％。人行道上的树木也降低了地球温度。减少主要归因于他们投射的阴影导致的辐射通量的减少。此外，即使在阴影遮蔽的地方，由于植被造成的热缓解仍然存在。相反，植被中带的缓解效果并不明显。面对西南墙的人行道表现出最显着的热缓解作用。

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  • 来源
    《Building and Environment》 |2012年第10期|p.38-46|共9页
  • 作者

    Minsun Park; Aya Hagishima; Jun Tanimoto; Ken-ichi Narita;

  • 作者单位

    Interdisciplinary Graduate School of Engineering Science, Kyushu University, 6-1-F208 Kasugakouen, Kasuga-si, Fukuoka 816-8580, Japan;

    Interdisciplinary Graduate School of Engineering Science, Kyushu University, 6-1-F208 Kasugakouen, Kasuga-si, Fukuoka 816-8580, Japan;

    Interdisciplinary Graduate School of Engineering Science, Kyushu University, 6-1-F208 Kasugakouen, Kasuga-si, Fukuoka 816-8580, Japan;

    Department of Architecture, Nippon Institute of Technology, 4-1 Cakuendai, Miyashiro-machi, Minamisaitama-gun, Saitama 345-8501, Japan;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    outdoor thermal environment; urban vegetation; field measurement; scale model site;

    机译：室外热环境;城市植被;现场测量比例模型站点;

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