Analysis of Supply–Demand Relationship of Cooling Capacity of Blue–Green Landscape under the Direction of Mitigating Urban Heat Island

Shengyu Guan, Shuang Liu, Xin Zhang, Xinlei Du, Zhifang Lv and Haihui Hu ()
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Shengyu Guan: College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China
Shuang Liu: College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China
Xin Zhang: College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China
Xinlei Du: College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China
Zhifang Lv: College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China
Haihui Hu: College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China

Sustainability, 2023, vol. 15, issue 14, 1-22

Abstract: Urban blue–green landscapes (UBGLs) have an important impact on the mitigation of UHIs. Clarifying the supply/demand relationship of the UBGLs’ cooling effect can serve as an indicator for high-quality urban development. We established the cooling capacity supply–demand evaluation systems of UBGLs by using multi-source data and a suitable landscape mesh size. Furthermore, we utilized the coupling coordination degree (CCD) model and the linear regression equation method to explore the spatial distribution of and variation in UBGLs’ cooling efficiency. The results showed the following: (1) according to the UBGL/SUHI landscape pattern index and the Pearson correlation coefficient of the land surface temperature (LST), the optimal mesh size was found to be 1200 m. (2) According to the unitary linear regression calculation, the matching of the cooling capacity supply and demand in the context of Qunli New Town showed obvious polarization; furthermore, Hanan new town and old town are more balanced than Qunli new town. (3) According to the spatiotemporal dynamic evolution of CCD, the proportion of moderate coordination- advancing cooling efficiency is the highest, reaching 35.3%. Second are moderate imbalance–hysteretic cooling efficiency (18.4%) and moderate imbalance–systematic balanced development (13.7%), with the old city highly coordinated area as the center and the coupling coordination type (gradually outward) turning into a state of serious imbalance, and then back into a state of high coordination. The findings of the investigations enriched a new viewpoint and practical scientific basis for UBGL system planning and cooling efficiency equity realizations.

Keywords: surface urban heat island spaces (SUHIs); urban blue–green landscapes (UBGLs); cooling efficiency; supply level; demand level; coupling coordination degree (CCD); Harbin city (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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