合肥市夏季城市公园降温效应与优化策略研究

随着我国城镇的快速化发展,城市热环境问题日益恶化。作为城市绿色空间的重要构成部分,城市公园在优化城市热环境方面具有明显效果。本文以安徽省合肥市主城区的18个城市公园为例,基于Landsat8OLI/TIRS遥感数据通过单窗算法反演出地温数据,采用缓冲区分析法计算城市公园的降温效应特征,从降温幅度和降温距离2个维度量化合肥市城市公园的冷岛效应,并分析公园中影响降温效应的主要因素,以期为城市热环境优化与绿地规划提供参考。

With the rapid development of cities and towns,the problem of urban thermal environment is deteriorating.As an important component of urban green space,urban parks have obvious effects in optimizing the urban thermal environment.This study takes 18 urban parks in the main urban area of Hefei City as example.Based on Landsat8 OLI/TIRS remote sensing data,the ground temperature data is inverted by single window algorithm.Buffer zone analysis method is used to calculate the cooling effect characteristics of urban parks.The cold island effect of urban parks in Hefei City is quantified from two dimensions:cooling amplitude and cooling distance.The main factors affecting the cooling effect in the parks are analyzed,so as to provide reference for urban thermal environment optimization and green space planning.