NDLI: Cooling Effect of Urban Blue and Green Spaces: A Case Study of Changsha, China.

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Cooling Effect of Urban Blue and Green Spaces: A Case Study of Changsha, China.

Content Provider	Europe PMC
Author	Qiu, Xinyi Kil, Sung-Ho Jo, Hyun-Kil Park, Chan Song, Wonkyong Choi, Yun Eui
Editor	Chon, Jinhyung Kim, Gunwoo
Copyright Year	2023
Abstract	The cooling effects of blue-green spaces on the urban heat island effect are complex and different. The purpose of this study is to simulate how the cooling effect of blue-green space changes with its size and shape. The cooling effects of 53 green patches and 28 water bodies in Changsha were extracted based on Landsat images. A surface fitting model was used to quantitatively reveal the relationship between the cooling effect of blue-green space and its size and shape. The results show that the cooling effects of blue-green spaces were enhanced with the increasing size, and then would become stable after a certain range (threshold). Certain thresholds were identified between the blue and green space areas (2.98 ha and 3.15 ha, respectively) and the cooling distance, and between the blue and green space areas (4.84 ha and 4.92 ha, respectively) and the cooling magnitude. In addition, the green space with an area of 9.08 ha and landscape shape index (LSI) of 2.97 could achieve a better cooling distance (413.46 m); and the blue space with an area of 29.4 ha and LSI of 1.75 could achieve a better cooling magnitude (5.17 °C). These findings provide useful guidelines for urban planning and improving urban livability in other regions with terrain and climate conditions similar to Changsha.
ISSN	16617827
Journal	International Journal of Environmental Research and Public Health [Int J Environ Res Public Health]
Volume Number	20
DOI	10.3390/ijerph20032613
PubMed Central reference number	PMC9916382
Issue Number	3
PubMed reference number	36767979
e-ISSN	16604601
Language	English
Publisher	Molecular Diversity Preservation International (MDPI)
Publisher Date	2023-02-01
Access Restriction	Open
Subject Keyword	blue–green space planning remote sensing surface fitting threshold urban thermal environment
Content Type	Text
Resource Type	Article
Subject	Health, Toxicology and Mutagenesis Pollution Public Health, Environmental and Occupational Health

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