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<p>With the rapid advancement of urbanization, surface deformation driven by engineering and environmental factors poses increasing risks to the socio-economic stability of Tengchong City's central urban area. This study utilizes the Small Baseline Subsets Interferometric Synthetic Aperture Radar (SBAS-InSAR) technique to process 58 descending Sentinel-1 images acquired between June 2021 and June 2023, aiming to detect and characterize the spatiotemporal evolution of ground deformation. The results reveal that: (1) The surface deformation rate during the monitoring period ranged from − 68.74&#xa0;mm/yr to 27&#xa0;mm/yr, where “mm/yr” denotes millimeters per year. Most regions remained stable, but significant subsidence exceeding 50&#xa0;mm/yr was observed in the northwest and southeast of Tianxin Village, segments of the Kadong line, the northwest of Zuosuo Ying, and the Tengchong Airport connector. These areas exhibit abnormal deformation, potentially threatening infrastructure and urban development. (2) The primary causes of subsidence in typical deformation zones are anthropogenic activities, such as urban expansion, foundation differentials, earthworks, and road construction. Validation using field investigation and optical imagery confirms the consistency of SBAS-InSAR results in both spatial distribution and deformation magnitude. These findings highlight the reliability and applicability of SBAS-InSAR for urban surface deformation monitoring and disaster risk assessment.</p>

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Monitoring and Analysis of Surface Deformation in the Central Urban Area of Tengchong City Based on SBAS-InSAR Technology

  • 期刊论文

  • 发表日期：

    2026年3月24日

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  • Caiqiong Wang,
  • Langlang Yang,
  • ShiLin Zou,
  • Xingsheng Yue,
  • Weiwei Xiong

摘要

With the rapid advancement of urbanization, surface deformation driven by engineering and environmental factors poses increasing risks to the socio-economic stability of Tengchong City's central urban area. This study utilizes the Small Baseline Subsets Interferometric Synthetic Aperture Radar (SBAS-InSAR) technique to process 58 descending Sentinel-1 images acquired between June 2021 and June 2023, aiming to detect and characterize the spatiotemporal evolution of ground deformation. The results reveal that: (1) The surface deformation rate during the monitoring period ranged from − 68.74 mm/yr to 27 mm/yr, where “mm/yr” denotes millimeters per year. Most regions remained stable, but significant subsidence exceeding 50 mm/yr was observed in the northwest and southeast of Tianxin Village, segments of the Kadong line, the northwest of Zuosuo Ying, and the Tengchong Airport connector. These areas exhibit abnormal deformation, potentially threatening infrastructure and urban development. (2) The primary causes of subsidence in typical deformation zones are anthropogenic activities, such as urban expansion, foundation differentials, earthworks, and road construction. Validation using field investigation and optical imagery confirms the consistency of SBAS-InSAR results in both spatial distribution and deformation magnitude. These findings highlight the reliability and applicability of SBAS-InSAR for urban surface deformation monitoring and disaster risk assessment.