悬铃木树形结构对城市街道小气候及行人热舒适的影响研究  

The Effect of the Tree Structure of Platanus on the Microclimate and Pedestrian Thermal Comfort in Urban Street

作　　者：王涵 胡炎军 晏海[1] 吴仁武[1] 包志毅[1] WANG Han;HU Yanjun;YAN Hai;WU Renwu;BAO Zhiyi(School of Landscape Architecture and Architecture,Zhejiang A&F University,Lin'an 311300;College of Landscape Architecture and Architecture,Zhejiang A&F University,Lin'an 311300)

机构地区：[1]浙江农林大学风景园林与建筑学院,临安311300

出　　处：《中国园林》2025年第4期123-129,共7页Chinese Landscape Architecture

基　　金：国家自然科学基金项目(51508515);浙江省基础公益研究计划(LGF21E080001)。

摘　　要：行道树可以通过其树冠的遮阴及蒸腾作用有效改善城市街道热环境。悬铃木因其冠大荫浓、耐修剪整形的特性被广泛用作行道树。选取杭州市典型街谷为例,采用ENVI-met数值模拟的方法探讨了悬铃木树形结构对街道峡谷小气候及行人热舒适的影响。结果表明,悬铃木树冠形态和枝叶密度对街道气温及相对湿度影响较小,而树形结构对街道风速具有明显的调节作用。悬铃木树形结构能够有效降低街道平均辐射温度(MRT),尤其在容易产生热应激的午后时段,平均辐射温度可以减少13℃。研究结果可以为城市道路绿化规划设计及修剪管理提供参考,以提升街道行人热舒适和热安全。As a beautiful landscape in the urban ecosystem,street trees not only beautify every corner of the city,but also provide a lot of benefits for urban residents with their unique ecological functions.Among them,the shading effect and transpiration of the tree canopy become an important means for street trees to improve the thermal environment of urban streets.In the hot summer,the canopy of street trees is like a huge umbrella,providing a cool shelter for pedestrians,and at the same time,the water released by its leaves through transpiration also helps to reduce the temperature of the surrounding environment,bringing a touch of coolness to the city.Among the many species of street trees,Platanus has become a leader in urban greening because of its large crown,dense shade,rapid growth,and resistance to pruning and shaping.With its wide canopy and dense foliage,the Platanus tree provides ample shade for the street.At the same time,its trunk is straight and its branches are easy to prune,which makes the balsam tree able to meet the demand for shade and maintain a clean and beautiful street image when used as a street tree.In order to deeply investigate the influence of the tree structure of Pterocarpus indicus on the microclimate of urban streets and the thermal comfort of pedestrians,the researchers selected a typical street valley in Hangzhou as the research object and carried out an in-depth study by using advanced ENVI-met numerical simulation technology.The results show that although the canopy shape and branch density of Picea abies have a relatively small impact on the air temperature and relative humidity of the street,its unique tree structure shows a significant effect in regulating the wind speed of the street.The canopy of Picea abies guides the wind direction,resulting in a more even distribution of wind speed in the street,which helps to improve the ventilation of the street and enhances the thermal comfort of pedestrians.In addition,the study also found that the tree structure of Picea abies performed w

关 键 词：风景园林 街道峡谷 悬铃木 树形结构 热舒适 

分 类 号：TU986[建筑科学—城市规划与设计]