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Impact of small-scale tree planting patterns on outdoor cooling and thermal comfort
Sustainable Cities and Society ( IF 11.7 ) Pub Date : 2020-02-05 , DOI: 10.1016/j.scs.2020.102085
Babak Abdi , Ahmad Hami , Davoud Zarehaghi

The issues of local climate change, urban heat islands and improving outdoor thermal comfort in cities demand special attention in urban planning. This paper examines the effect of various plant arrangements, plant type, and the direction of the rows of trees against the prevailing wind on micrometeorological conditions and thermal comfort. The study area was simulated using the ENVI-met model. It was validated by comparing the values of the output parameters of the model with field measurements. Finally, the proposed scenarios were simulated in the model and identified after analyzing scenarios that displayed better performance in improving outdoor thermal comfort. The results indicated that the rectangular planting of evergreen trees in the outer rows and deciduous trees in the inner rows in a direction perpendicular to the prevailing wind produced the most optimal condition in improving outdoor thermal comfort (1.3 Predicted Mean Vote (PMV) reduction). Also, triangular patterns perpendicular to wind direction with evergreen trees brought out the weakest performance in improving thermal comfort (0.2 PMV reduction). The findings of the research can be used by landscape designers and urban planners to enhance green space designs, develop sustainable cities, and improve thermal comfort in residential areas.



中文翻译:

小型植树方式对室外降温和热舒适性的影响

当地气候变化,城市热岛和城市室外热舒适性改善等问题在城市规划中需要特别注意。本文研究了微风条件和热舒适性对各种植物布置,植物类型以及成行的树木抵抗盛行风向的影响。研究区域是使用ENVI-met模型进行模拟的。通过将模型的输出参数值与现场测量值进行比较来验证这一点。最后,在模型中对提出的方案进行了仿真,并在分析了在改善室外热舒适性方面显示出更好性能的方案之后对其进行了识别。结果表明,在垂直于盛行风的方向上,在外行的常绿乔木和内行的落叶乔木的矩形种植为改善室外热舒适度提供了最佳条件(1.3预测平均投票(PMV)降低)。此外,与常绿乔木垂直于风向的三角形图案在改善热舒适性(降低0.2 PMV)方面表现出最弱的表现。景观设计师和城市规划人员可以使用该研究的结果来增强绿色空间设计,发展可持续城市并改善居住区的热舒适性。与常绿乔木垂直于风向的三角形图案在改善热舒适性(降低0.2 PMV)方面表现最弱。景观设计师和城市规划人员可以使用该研究的结果来增强绿色空间设计,发展可持续城市并改善居住区的热舒适性。与常绿乔木垂直于风向的三角形图案在改善热舒适性(降低0.2 PMV)方面表现最弱。景观设计师和城市规划人员可以使用该研究的结果来增强绿色空间设计,发展可持续城市并改善居住区的热舒适性。

更新日期:2020-02-05
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