The cooling effects of hybrid landscapes at the district scale in mega-cities: A case study of Shanghai

被引:18
作者
Sheng, Shuo [1 ]
Xiao, Huabin [2 ]
Wang, Yuncai [1 ]
机构
[1] Tongji Univ, Coll Architecture & Urban Planning, Shanghai 200092, Peoples R China
[2] Shandong Jianzhu Univ, Sch Architecture & Urban Planning, Jinan 250101, Peoples R China
关键词
Districtheatisland; Hybridlandscapes; Coolingintensity; Marginaleffect; Buildingenvironment; URBAN HEAT-ISLAND; K-MEANS; MITIGATION; GREEN; INFRASTRUCTURE; VEGETATION; ALGORITHM;
D O I
10.1016/j.jclepro.2022.132942
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Green spaces and water bodies can mitigate urban heat islands, and their cooling effects are influenced by certain characteristics and the surrounding environments. Under the influence of diverse built environments, what kinds of hybrid landscapes have a cooling effect, and which are ineffective? It is an essential issue to mitigate heat islands on the district scale, especially in mega-cities, and there remain fewer quantitative studies targeting it. This study developed a technical framework to analyze the cooling intensity and efficiency of hybrid landscapes in different built environments and took a typical mega-city, Shanghai, as an example. The samples were clas-sified into five groups by characteristics of the built environment based on the proportions of buildings and their shadows. Furthermore, the efficient cooling intervals and the cooling intensities of hybrid landscape elements were identified based on their marginal effects. The findings showed that of all the elements, urban forests have a cooling capacity across various built environments, while water bodies and grasslands do not. In general, hybrid landscapes' cooling effects are weaker in districts with higher building density. This technical framework pro-vides a way to mitigate heat islands in districts by planning hybrid landscapes, which can be generalized and be of practical value.
引用
收藏
页数:12
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