Study on the appropriate selection of urban heat island measure technologies to urban block properties
Study on the appropriate selection of urban heat island measure technologies to urban block properties
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城市热岛措施技术对城市街区属性的适宜选择研究
DOI：
10.1016/j.scs.2014.01.008
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发表时间：
2014
影响因子：
11.7
通讯作者：
Sae Kyogoku
中科院分区：
文献类型：
--
作者：
H. Takebayashi;Yutaro Kimura;Sae Kyogoku
本研究以典型街道峡谷模型为例，分析了城市热岛效应测量技术的应用效果，以帮助选择合适的测量技术。在改善人行道热环境方面，可以采用行道树，在路面上铺设高反射率涂料或保水性路面，以降低路面温度。人行道路面的太阳辐射增益的减少取决于行道树阴影的位置和面积，其可能发生在东西向道路的北方人行道上，而不是南北向道路的东部（或西部）人行道上。阴影的面积与树冠宽度（半径）的平方成正比，与树与树之间的距离成反比。因此，有必要根据道路方向和行人使用人行道最高的时间来优先考虑这些因素。
In this study, we analyzed the effects of introducing urban heat island measure technologies in a typical street canyon model to aid the selection of a suitable technology. It is appropriate to use street trees for improving the thermal environment of a sidewalk and high reflectance paint or water-retentive pavement for the reduction of surface temperature on the roadway. Reduction of solar radiation gain to the sidewalk pavement surface depends on the location and area of the street tree shadows, which are likely to occur on the northern sidewalk of an east–west road rather than an eastern (or a western) sidewalk of a north–south road. Moreover, the area of the shadow is proportional to the square of the width of tree crown (the radius) and inversely proportional to the distance between trees. Thus, it is necessary to prioritize these considerations based on the road orientation and time when the pedestrian use of sidewalk is the highest.