Tree crown geometry and its performances on human thermal comfort adjustment

Journal of Urban Management

Kou Kou¹  Yanfeng Yao²  Chunlu Wang³  Wei Guo⁴  Jing Wang⁵  Yeting Zhang⁶  Deqing Xian⁷ 

[1] Corresponding author.;Economics, Zhejiang, China;;College of Humanities, Ningbo University of Finance &Deyang Installation Technician College, Sichuan, China;Gongle Secondary School of Xing Wen Town (四川省共乐初中), Sichuan, China;No. 3 High School of Yibin, Sichuan, China;School of Manufacturing Science and Engineering, Southwest University of Science and Technology, Sichuan, China;

关键词: Canopies;    Tree crown radius;    sky view factor;    Outdoor thermal comfort;    Leaf area index;   

DOI  :  

来源: DOAJ

【 摘 要 】

Trees play an important part in landscaping as well as thermal environment adjustment. This study selected a satellite city of Sichuan Province in China, Xindu, for field measurement about tree’s crown characteristics on their cooling performances on five sunny summer days during August 2019. There were several parameters showing tree characteristics used, including tree canopying size (tree crown radius, TCR), tree geometry (the ratio of TCR to trunk height, R/TH), site openness (sky view factor, SVF), and leaf density (leaf area index, LAI). It was found that R/TH had the most significant thermal adjusting effects than others. The increase of R/TH by 1 can reduce physiological equivalent temperature by approximately 2.5 ​°C (R2 ​= ​0.8932) and 2.65 ​°C (R2 ​= ​0.8424) in the morning and afternoon respectively. SVF and LAI had less significant cooling effect due to the fact of dense-leaf season. This result provided good direction for future landscape design towards microclimate adjustment.

【 授权许可】

Unknown