Lin et al. (2026) Effects of Physical Urbanization and Natural Topography on the Spatiotemporal Variability of Extreme Precipitation: A Case Study of the Zhengzhou Metropolitan Area, China

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Identification

• Journal: Land
• Year: 2026
• Date: 2026-09-15
• Authors: Jiayi Lin, Ruinan Zheng, Shiyun Guo, Yanhe Niu, Yakai Lei
• DOI: 10.3390/land15091715

Research Groups

• Institute of Atmospheric Physics, Chinese Academy of Sciences
• School of Earth Science and Resources, China University of Geosciences (Beijing)

Short Summary

This study investigates the impact of physical urbanization on extreme precipitation events in the Zhengzhou Metropolitan Area, central China, using 37 years of daily precipitation records. The results show that physical urbanization-related landscape patterns and topography have distinct and temporally varying associations with extreme precipitation.

Objective

• Investigate the spatiotemporal dynamics and driving mechanisms of extreme precipitation in a rapidly urbanizing metropolitan region

Study Configuration

• Spatial Scale: Metropolitan scale, focusing on the Zhengzhou Metropolitan Area (central China)
• Temporal Scale: 37 years (1985–2021)

Methodology and Data

• Models used: Geographically and Temporally Weighted Regression (GTWR) model
• Data sources: Daily precipitation records from 51 meteorological stations

Main Results

• PRCPTOT increased by 1.12 mm per decade, while Rx5day increased by 0.43 mm per decade
• Spatially heterogeneous relationships between physical urbanization, topography, and extreme precipitation were observed
• The GTWR model explained 89% of the variation in PRCPTOT

Contributions

• This study provides new insights into the impact of physical urbanization on extreme precipitation events at the metropolitan scale
• The findings can inform flood-resilient urban planning and climate-adaptive spatial governance in rapidly urbanizing regions

Funding

• National Natural Science Foundation of China (Grant No. 42175064)
• Key Research Program of Frontier Sciences, Chinese Academy of Sciences (Grant No. QYZDY-SSW-DQC005)

Citation

@article{Lin2026Effects,
  author = {Lin, Jiayi and Zheng, Ruinan and Guo, Shiyun and Niu, Yanhe and Lei, Yakai},
  title = {Effects of Physical Urbanization and Natural Topography on the Spatiotemporal Variability of Extreme Precipitation: A Case Study of the Zhengzhou Metropolitan Area, China},
  journal = {Land},
  year = {2026},
  doi = {10.3390/land15091715},
  url = {https://doi.org/10.3390/land15091715}
}