Surface-type-dependent deformation in a reclaimed coastal campus revealed by PS-InSAR: A case study of persistent heterogeneity and limited climatic influence
- 1Wenzhou Key Laboratory of Space-Air-Ground Integrated Monitoring and Intelligent Intervention for Building Safety, Wenzhou University of Technology, Wenzhou, China
- 2College of Architecture and Energy Engineering, Wenzhou University of Technology, Wenzhou, China
Abstract
Ground deformation in coastal reclaimed areas poses significant risks to infrastructure stability and urban sustainability. This study investigates spatiotemporal deformation patterns within a reclaimed coastal urban environment represented by a university campus in Wenzhou, eastern China, using Persistent Scatterer Interferometric Synthetic Aperture Radar (PS-InSAR) based on Sentinel-1 data. Unlike previous InSAR studies that mainly focused on regional-scale deformation patterns or broad land-use categories, this study investigates deformation heterogeneity among engineered surface types at the intra-urban scale, including roads, playgrounds, and building areas. The results reveal pronounced deformation heterogeneity among different surface types. Roads and playgrounds exhibit similar and persistent subsidence behavior, with average deformation rates of approximately −21 mm/year, whereas building areas show substantially weaker overall deformation and greater local variability. These differences are consistently reflected in both spatial distribution and temporal evolution patterns, demonstrating persistent contrasts among surface types throughout the observation period. To evaluate whether short-term deformation variability is associated with meteorological conditions, temperature and precipitation data were compared with detrended deformation time series using correlation and lag-correlation analyses. Although several temperature variables exhibit statistically significant relationships with deformation for specific surface types and lag periods, these relationships are generally weak and inconsistent. Similarly, precipitation shows only weak and surface-dependent associations with deformation anomalies. Therefore, the meteorological variables examined in this study cannot adequately explain the pronounced deformation differences observed among engineered surface types. Overall, the results demonstrate that surface-type differentiation provides an important perspective for interpreting deformation heterogeneity in reclaimed urban environments. The findings contribute to a better understanding of deformation variability among engineered urban surfaces and highlight the importance of considering surface characteristics in local-scale subsidence assessment.
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BibTeX
@article{chen2026surfacetypedependent,
title = {{Surface-type-dependent deformation in a reclaimed coastal campus revealed by PS-InSAR: A case study of persistent heterogeneity and limited climatic influence}},
author = {Hao Chen and Dehu Chen and Wei He},
journal = {Science Progress},
year = {2026},
month = sep,
doi = {10.1177/00368504261491578},
url = {https://doi.org/10.1177/00368504261491578},
note = {CC BY-NC 4.0},
}
RIS
TY - JOUR
TI - Surface-type-dependent deformation in a reclaimed coastal campus revealed by PS-InSAR: A case study of persistent heterogeneity and limited climatic influence
AU - Hao Chen
AU - Dehu Chen
AU - Wei He
PY - 2026
DA - 2026/09/21
JO - Science Progress
DO - 10.1177/00368504261491578
UR - https://doi.org/10.1177/00368504261491578
AB - Ground deformation in coastal reclaimed areas poses significant risks to infrastructure stability and urban sustainability. This study investigates spatiotemporal deformation patterns within a reclaimed coastal urban environment represented by a university campus in Wenzhou, eastern China, using Persistent Scatterer Interferometric Synthetic Aperture Radar (PS-InSAR) based on Sentinel-1 data. Unlike previous InSAR studies that mainly focused on regional-scale deformation patterns or broad land-use categories, this study investigates deformation heterogeneity among engineered surface types at the intra-urban scale, including roads, playgrounds, and building areas. The results reveal pronounced deformation heterogeneity among different surface types. Roads and playgrounds exhibit similar and persistent subsidence behavior, with average deformation rates of approximately −21 mm/year, whereas building areas show substantially weaker overall deformation and greater local variability. These differences are consistently reflected in both spatial distribution and temporal evolution patterns, demonstrating persistent contrasts among surface types throughout the observation period. To evaluate whether short-term deformation variability is associated with meteorological conditions, temperature and precipitation data were compared with detrended deformation time series using correlation and lag-correlation analyses. Although several temperature variables exhibit statistically significant relationships with deformation for specific surface types and lag periods, these relationships are generally weak and inconsistent. Similarly, precipitation shows only weak and surface-dependent associations with deformation anomalies. Therefore, the meteorological variables examined in this study cannot adequately explain the pronounced deformation differences observed among engineered surface types. Overall, the results demonstrate that surface-type differentiation provides an important perspective for interpreting deformation heterogeneity in reclaimed urban environments. The findings contribute to a better understanding of deformation variability among engineered urban surfaces and highlight the importance of considering surface characteristics in local-scale subsidence assessment.
SN - 0036-8504
SN - 2047-7163
ER -