Classification of sponge city construction modes based on regional features.

Area of Science:

• Urban Planning
• Environmental Science
• Geographic Information Systems (GIS)

Background:

• Sponge city construction models require adaptation to inherent urban characteristics for optimal effectiveness.
• A standardized index system is needed to classify and guide sponge city development across diverse regions.

Purpose of the Study:

• To construct a classification system for sponge city development indices.
• To analyze and categorize regions in mainland China based on their suitability for sponge city construction.
• To propose region-specific construction priorities.

Main Methods:

• Development of a sponge city construction index system.
• Application of multivariate statistical and cluster analysis.
• Utilizing Geographic Information System (GIS) for regional classification.

Main Results:

• Climatic, hydrological, and soil factors are primary drivers for sponge city construction.
• City scale, economic development, underlying surface, and geomorphology are secondary influencing factors.
• Ten distinct city clusters were identified, exhibiting a northeast-to-southwest zonal distribution, with over 80% showing this pattern.

Conclusions:

• The study provides a framework for classifying sponge city construction potential across China.
• Identified factors and regional clusters offer guidance for targeted and effective urban water management strategies.
• The presence of pilot cities within clusters serves as a valuable reference for future construction projects.