Urban ecosystem services supply-demand assessment from the perspective of the water-energy-food nexus. (March 2023)

• Record Type: Journal Article
• Authors: Ding, Tonghui; Chen, Junfei; Fang, Liping; Ji, Juan; Fang, Zhou
• Is Part Of: Sustainable cities and society. Volume 90(2023)
• Publication Date: 2023-03
• Subjects: Ecosystem services -- Water-energy-food nexus -- Correlation analysis -- Regression analysis -- Supply-demand matching degree -- Conceptual framework; Sustainable urban development -- Periodicals; Sustainable buildings -- Periodicals; Urban ecology (Sociology) -- Periodicals; 307.76
• DOI: 10.1016/j.scs.2023.104401
• Languages: English
• ISSNs: 2210-6707

Abstract

Highlights: A framework for assessing supply-demand of UESs related to WEF-Nexus was designed. Relations between water-energy-food nexus & urban ecosystem services were assessed. UESs were correlated with each subsystem of WEF-Nexus for city of Suzhou, China. Supply-demand matching of UESs related to WEF-Nexus for Suzhou was evaluated. Except water yield, other UESs related to WEF-Nexus were all in short supply. Abstract: To facilitate sustainable urban development, a pressing issue is how to integrate the water-energy-food nexus (WEF-Nexus) into the assessment of supply and demand of urban ecosystem services (UESs). This study proposed a conceptual framework for the supply-demand assessment of UESs from the WEF-Nexus perspective. Taking the city of Suzhou, China, as an example, the relationships between UESs and WEF-Nexus were identified by the correlation and regression analyses based on the total supply of each urban ecosystem service and evaluation value of each subsystem of WEF-Nexus. Then the supply-demand matching of UESs was evaluated by the supply-demand matching degree and z-score standardization. The results indicated that the water and energy subsystems were positively correlated with water yield/soil retention, and negatively correlated with carbon storage/food production. The food subsystem showed significant positive correlations with carbon storage/food production. Three UESs related to WEF-Nexus, carbon storage, soil retention and food production, were always in short supply, while water yield has shifted to oversupply. The supply-demand spatial mismatches of carbon storage/food production became more pronounced, showing a trend of spreading from urban central areas to the periphery. Therefore, this study provides a scientific basis for proposing supply-demand management strategies of UESs from the WEF-Nexus perspective.