A field research on the impact of underlying surface configuration on street thermal environment in Lhasa
A field research on the impact of underlying surface configuration on street thermal environment in Lhasa
复制标题
拉萨市下垫面形态对街道热环境影响的现场研究
DOI：
10.3934/environsci.2019.6.483
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发表时间：
2019-11
影响因子：
1.4
通讯作者：
Yingzi Zhang
中科院分区：
文献类型：
--
作者：
Lin Ma;Jun Zhang;Lixing Chen;Yingzi Zhang
商业街是城市居民户外活动的重要场所。其热环境的好坏直接影响到行人的舒适度和周围建筑的能耗。在不同气候背景下的小气候研究已经有了块尺度的研究，而对高海拔寒冷气候下的小气候研究还很少。西藏作为青藏高原的主体，呈现出典型的高原气候特征，其独特的自然气候条件必将催生特殊的城市环境问题。因此，本文以拉萨市为例，重点研究了在独特的高原气候条件下，不同下垫面构型对街道热环境的影响。通过对拉萨市玉托路、多森路和红旗路3条街道热环境的实地测量，分析了不同下垫面设计要素（绿化和水域）对街道近地面小气候和行人舒适度的影响。对实测数据的分析结果表明：不同方向的街道存在明显的温差。树木在东西走向的街道上有更显著的降温效果。树木的叶面积指数（LAI）会影响热环境的改善。喷泉在夏季有降温作用，但低于树木。本文的研究内容为进一步研究高海拔寒冷气候区的热环境和街道下垫面的优化设计提供了数据基础。
Commercial street is an important place for outdoor activities of urban residents. The quality of its thermal environment directly affects the comfort of pedestrians and the energy consumption of surrounding buildings. Block-scale microclimate studies have already been conducted in the context of different climates, while limited attention has been paid to the microclimate within high-altitude cold climate. Tibet, as the main body of the Qinghai-Tibet Plateau, presents typical plateau climate characteristics, and its unique natural climate conditions will certainly give birth to special urban environmental problems. Therefore, taking Lhasa as an example, this paper focuses on the impact of street thermal environment under different underlying surface configurations under unique plateau climate conditions. Based on the field measurement of the thermal environment of three streets in Lhasa City, namely, Yutuo Road, Duosen Road and Hongqi Road, the influence of different underlying surface design elements, namely, greening and water area, on the near ground microclimate and pedestrian comfort of the streets were analyzed. The analysis results of the measured datas show that: there are obvious temperature differences in the streets of different directions. Trees have a more significant cooling effect on East-West streets. The leaf area index (LAI) of trees will affect the improvement of thermal environment. Fountain has cooling effect in summer, but it is lower than that of trees. The research contents of this paper provides data basis for further research on the thermal environment and the optimization design of the underlying surface of the streets in the high altitude cold climate area.
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影响因子：
7.4
作者：
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通讯作者：
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