城市绿地绿量密度与地表温度的关系研究——以东南大学四牌楼校区为例  

Research on the relationship between green quantity density and land surface temperature of urban green space——Taking the Sipailou campus of Southeast University as an example

作　　者：曹息 卫笑 王晓俊[1] CAO Xi;WEI Xiao;WANG Xiaojun(College of Architecture,Southeast University,Nanjing 210096,China)

机构地区：[1]东南大学建筑学院,江苏南京210096

出　　处：《林业与生态科学》2024年第3期332-341,共10页Forestry and Ecological Sciences

基　　金：国家自然科学基金项目(50978054;51478105)。

摘　　要：校园绿地是城市绿地中的重要组成部分,为了研究城市绿地对热环境的调控功能,以东南大学四牌楼校区的校园绿地作为研究对象,采用无人机热红外拍摄提取地表温度数据,并结合实地调查确定绿地中植物的种类、冠幅,结合公式完成对绿地绿量及绿量密度的计算,通过函数回归的方法分析绿量密度与地表温度的关系。结果表明,绿地的地表温度与绿量密度呈对数函数关系,绿量密度存在大小阈值。当绿量密度≤小阈值(≤4.08 m 3/m 2)时,单位面积绿量与温度呈显著负相关性,绿量的增加会起到显著的降温效果;当绿量密度处于大小阈值之间(4.08 m 3/m 2,16.32 m 3/m 2)时,单位面积绿量与温度仍有负相关性,但绿量的增加使降温效果有所下降;当绿量密度≥大阈值(≥16.32 m 3/m 2)时,绿地自身的温度特性相对稳定,受绿量增加的影响较小。Campus green space was an important component of urban green space.In order to study the regulatory function of urban green space on the thermal environment,this research took the campus green space in the Sipailou campus of Southeast University as the research object,used UAV thermal infrared photography to extract surface temperature data,and combined field surveys to determine the types and crown widths of plants in the green space.Combined with formulas,the calculation of green quantity and green quantity density of the green space were completed.The relationship between green quantity density and land surface temperature was analyzed by functional regression method.The results showed that there was a logarithmic function relationship between surface temperature and green density of green space,and there was a threshold value for green quantity density.When the green quantity density was less than or equal to a small threshold value(≤4.08 m 3/m 2),the negative correlation between green quantity per unit area and temperature was significant,and an increase in green quantity would have a significant cooling effect;When the green quantity density was between the thresholds(4.08 m 3/m 2,16.32 m 3/m 2),there was still a negative correlation between the green quantity per unit area and temperature,but the cooling effect caused by the increase in green quantity decreases;When the green density was greater than or equal to a large threshold value(≥16.32 m 3/m 2),the temperature characteristics of the green space itself were relatively stable and less affected by the increase of green quantity.

关 键 词：城市绿地 三维绿量 绿量密度 地表温度 测温无人机 

分 类 号：X321[环境科学与工程—环境工程]