Identification of Priority Implementation Areas and Configuration Types for Green Infrastructure Based on Ecosystem...

Area of Science:

• Urban Ecology
• Environmental Science
• Spatial Planning

Background:

• Urbanization in developing countries leads to green infrastructure fragmentation.
• Increasing populations and construction land exacerbate the imbalance between urban ecosystem service supply and demand.
• This imbalance poses significant challenges to sustainable urban development.

Purpose of the Study:

• To quantitatively evaluate the excessive demand for six key urban ecosystem services in Zhengzhou.
• To identify priority areas for green infrastructure implementation based on excessive ecosystem service demand.
• To explore the relationship between population density and comprehensive excessive ecosystem service demand.

Main Methods:

• Entropy method for calculating ecosystem service weights.
• Spatial overlay analysis to determine comprehensive excessive ecosystem service demand.
• Bivariate spatial autocorrelation analysis to assess population density's response to excessive ecosystem service demand.

Main Results:

• Carbon dioxide (CO2) sequestration service demand is the most prevalent unmet need.
• Excessive demands for most ecosystem services, except hydrological regulation, are concentrated in older urban neighborhoods.
• Rainwater regulation service received the highest weight, indicating inadequate urban infrastructure for flood management.
• Eight priority blocks for green infrastructure implementation were identified in Zhengzhou's central city.
• Population density and comprehensive excessive ecosystem service demand exhibit a positive correlation, with high-high, low-high, and low-low agglomeration types observed.

Conclusions:

• Zhengzhou faces significant challenges in meeting urban ecosystem service demands, particularly for CO2 sequestration and flood regulation.
• Older neighborhoods require targeted green infrastructure interventions to address concentrated ecosystem service deficits.
• The findings provide crucial data for urban planners to prioritize green infrastructure development in rapidly urbanizing areas.
• Understanding the spatial correlation between population density and ecosystem service demand is vital for effective urban planning and management.