Sponge city construction and population health

Area of Science:

• Environmental Science
• Urban Planning
• Public Health

Background:

• Sponge city construction in China addresses urbanization challenges and stormwater management.
• The impact of urban policies on population health, particularly through environmental changes, is under-researched.

Purpose of the Study:

• To investigate the causal effect of China's sponge city pilot policy on population health.
• To explore the mechanisms through which sponge city construction influences health outcomes.

Main Methods:

• Utilized a quasi-natural experiment with a Difference-in-Differences (DID) model.
• Analyzed panel data from 119 Chinese cities (2011-2019) and the China Labor-force Dynamics Survey (CLDS).

Main Results:

• Sponge city policies significantly improved population health by 10.4%.
• The policy reduced ecological pollution and enhanced the built environment quality.
• Health benefits were more pronounced in lower administrative-level cities and among non-older adults.

Conclusions:

• Sponge city construction positively impacts population health, primarily through built environment improvements.
• The study provides evidence linking urban policy, environmental change, and public health.
• Findings offer insights for optimizing sponge city policy objectives for health benefits.