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Coupling coordination and spatiotemporal dynamic evolution between urbanization and geological hazards-A case study
1State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China; State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China.
The Science of the Total Environment
|May 4, 2020
Summary
Urbanization and geological hazards show a U-shaped relationship, with coupling coordination improving over time. Northeastern China exhibits higher coordination than the southwest, indicating a shift towards transitional development.
Area of Science:
- Environmental Science
- Geosciences
- Urban Planning
Background:
- Investigating the coupling coordination between urbanization and geological hazards is crucial for sustainable development.
- Understanding this relationship informs environmental management and policy-making.
Purpose of the Study:
- To quantitatively analyze the dynamic mechanism and spatiotemporal distribution of coupling coordination between urbanization and geological hazards.
- To assess the evolution of this relationship within the context of China's Five-Year Plans.
Main Methods:
- Construction of a comprehensive index system for urbanization and geological hazards.
- Development of an improved coupling coordination degree (CCD) model.
- Application of Moran's I and a genetic algorithm-based projection pursuit model for spatial-temporal analysis.
Main Results:
- Urbanization continuously increased, while geological hazards initially decreased then rose.
- A U-shaped relationship was observed between the two subsystems.
- Coupling coordination degree (CCD) was higher in northeastern China, with significant spatial dependency.
- Southwestern provinces showed low-low clustering, while northeastern provinces exhibited high-high clustering, driven by environmental and human factors.
- Provinces in transitional and balanced development increased, while unbalanced development decreased over 17 years.
Conclusions:
- The coupling coordination between urbanization and geological hazards is evolving from unbalanced to transitional development.
- Spatial disparities in coordination exist, with a trend of improvement extending from northeast to southwest China.
- Environmental factors and human activities significantly influence the spatial patterns of coupling coordination.
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