城市蓝绿空间特征参数与地表温度的关联量化分析

编号 lyqk010113

中文标题 城市蓝绿空间特征参数与地表温度的关联量化分析

作者 宋菊芳  江雪妮  郭贞妮  吴金宁  刘学军 

作者单位 武汉大学城市设计学院 湖北省人居环境工程技术研究中心 武汉 430072

期刊名称 中国城市林业 

年份 2023 

卷号 21

期号 1

栏目名称 专题:城市森林小气候 

中文摘要 如何发挥城市蓝绿空间的生态作用是缓解热岛效应亟待解决的重要问题,对于优化人居环境与提升城市品质有重要的意义。文章以武汉市3个代表性的湖泊样区作为研究对象,利用Landsat-8遥感影像分布矢量数据,结合ArcGIS、ENVI、Fragstats、SPSS等数据分析工具进行蓝绿空间特征参数与地表温度的关联量化分析。结果表明:1)降温幅度与离岸距离密切相关;2)样区水体与植被的降温能力随着缓冲带距离的增加而降低,有效降温距离为250~470 m;3)水体周边绿化覆盖率在40%以上时有助于冷岛效应的扩散,不透水面覆盖范围高于0.8的区域会明显阻碍蓝绿空间冷岛效应的扩散,通过提高水体岸线及绿地斑块边界复杂程度能产生更强的降温效应;4)蓝绿空间冷岛效应具有方向性,主要与水体形态有关,当水体周边地区植被覆盖指数达到0.6以上时会牵引冷岛效应分布方向。在此基础上提出优化建议,以期为城市蓝绿空间的规划与热环境改善提供参考。

关键词 蓝绿空间  冷岛效应  地表温度  冷岛强度 

基金项目 国家自然科学基金面上项目(51579182)

英文标题 Quantitative Analysis of the Correlation Between Urban Blue-Green Space Characteristics Parameters and Land Surface Temperature

作者英文名 Song Jufang, Jiang Xueni, Guo Zhenni, Wu Jinning, Liu Xuejun

单位英文名 School of Urban Design, Wuhan University; Hubei Human Settlement Environment Engineering Technology Research Center, Wuhan 430072, China

英文摘要 How to give play to the ecological role of urban blue-green spaces is a critical issue that is urgently needed to mitigate the island effect. The paper takes three representative lakes in Wuhan as the study areas and uses Landsat-8 remote sensing image distribution vector data, combined with ArcGIS, ENVI, Fragstats, SPSS and other data analysis tools to make the quantitative analysis of the correlation between spatial characteristics parameters of blue-green spaces and land surface temperature. The results show that:1) The magnitude of cooling is closely related to the distance off shore; 2) The cooling capacity of water bodies and vegetation in the sample area decreases with the increase of the distance from the buffer zone, and the effective cooling distance is in the ranges from 250 to 470 m; 3) When the green coverage around the water body is above 40% will help the diffusion of the cold island effect, the area with impervious surface coverage above 0.8 will obviously hinder the diffusion of the cold island effect in blue-green spaces, and increasing the shoreline of water body and the boundary complexity in green space patches can produce stronger cooling effect; and 4) The cold island effect of blue-green spaces is directional, which is mainly related to the morphology of water body. When the vegetation cover index of the area around water bodies reaches 0.6 or more will also influence the direction of the cold effect distribution. On this basis, suggestions are proposed to optimize urban blue-green spaces, with the aim at providing references to the urban blue-green space planning and the thermal environment improvement.

英文关键词 blue-green space;cold island effect;land surface temperature;cold island intensity

起始页码 20

截止页码 26

投稿时间 2021/3/29

作者简介 宋菊芳(1972-),女,博士,副教授,研究方向为城市景观规划与设计。E-email:sjufang@whu.edu.cn

通讯作者介绍 刘学军(1975-),男,博士,副教授,研究方向为城市交通与基础设施规划。E-email:xjliu@whu.edu.cn

E-mail xjliu@whu.edu.cn

DOI 10.12169/zgcsly.2021.03.29.0003

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