Abstract
Mitigating the thermal environment by lakes in the urbanization context has been well understood. Meanwhile, whether a difference exists between the cooling effect of urban and rural lakes and the impacts of surrounding landscape patterns on lake cooling effect (LCE) has not been intensively investigated. In this study, 18 lakes in Wuhan have been selected to decipher land surface temperature variations along with distances from lakes and quantify the cooling effect of each lake. We also identified the local thermal anomalies around urban lakes compared with rural lakes and performed Pearson correlation analysis between the thermal anomalies, the LCE, and the landscape metrics. The results showed that the LCE of different lakes greatly varied, and the LCE for urban lakes was greater than rural lakes. Many thermal anomalies existed around urban lakes compared with rural lakes, while lakes with higher thermal anomalies surrounding tended to receive greater LCE. The areas with high proportions, intensive, irregular-shaped, and aggregated built-up received higher cooling effect from lakes, while areas with green space of the same characteristics were likely to weaken this effect. The findings can support the optimization of the cooling effect of urban lakes to mitigate the urban thermal environment.
Published Version
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