Quantifying the Cooling Effect and Scale of Large Inner-City Lakes Based on Landscape Patterns: A Case Study of Hangzhou and Nanjing
Quantifying the Cooling Effect and Scale of Large Inner-City Lakes Based on Landscape Patterns: A Case Study of Hangzhou and Nanjing
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DOI：
10.3390/rs13081526
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发表时间：
2021-04
期刊：
影响因子：
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通讯作者：
Yaoyao Zheng;Yao Li;H. Hou;Y. Murayama;Ruci Wang;T. Hu
中科院分区：
文献类型：
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作者：
Yaoyao Zheng;Yao Li;H. Hou;Y. Murayama;Ruci Wang;T. Hu
世界范围内的快速城市化带来了各种环境问题。城市热岛现象与人们的日常生活有着密切的联系，是人们最关注的问题之一。水体通常被认为是缓解热岛问题的重要资源。在这种情况下，开发一种方法来测量城市地区水体的冷却效果和规模是至关重要的。本研究选择西湖和玄武湖这两个著名的内城天然湖泊作为测量对象。基于Landsat 8 Operational land Imager/Thermal Infrared Sensor （OLI/TIRS）数据和Sentinel-2数据，采用散点图和多元线性回归模型检测离湖距离与地表温度的关系。结果表明，西湖和玄武湖在几百米范围内（西湖为471 m，玄武湖为336 m）显著降低了地表温度，在几千米范围内（西湖为2900 m，玄武湖为3700 m）具有潜在的降温作用。研究结果为城市规划者在城市区域的大型湖泊设计和冷却效果需求之间进行权衡提供了见解。
The rapid urbanization worldwide has brought various environmental problems. The urban heat island (UHI) phenomenon is one of the most concerning issues because of its strong relation with daily lives. Water bodies are generally considered a vital resource to relieve the UHI. In this context, it is critical to develop a method for measuring the cooling effect and scale of water bodies in urban areas. In this study, West Lake and Xuanwu Lake, two famous natural inner-city lakes, are selected as the measuring targets. The scatter plot and multiple linear regression model were employed to detect the relationship between the distance to the lake and land surface temperature based on Landsat 8 Operational Land Imager/Thermal Infrared Sensor (OLI/TIRS) and Sentinel-2 data. The results show that West Lake and Xuanwu Lake massively reduced the land surface temperature within a few hundred meters (471 m for West Lake and 336 m for Xuanwu Lake) and have potential cooling effects within thousands of meters (2900 m for West Lake and 3700 m for Xuanwu Lake). The results provide insights for urban planners to manage tradeoffs between the large lake design in urban areas and the cooling effect demands.