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Land subsidence (2004–2013) in Changzhou in Central Yangtze River delta revealed by MT-InSAR

Author

Listed:
  • Bangyan Zhu

    (NanJing Research Institute of Surveying, Mapping & Geotechnical Investigation, Co. Ltd
    Beijing Key Laboratory of Urban Spatial Information Engineering)

  • Zhengwei Chu

    (NanJing Research Institute of Surveying, Mapping & Geotechnical Investigation, Co. Ltd)

  • Fei Shen

    (Ministry of Education)

  • Wei Tang

    (China University of Mining & Technology)

  • Bin Wang

    (Nanjing Tech University)

  • Xiao Wang

    (Huaihai Institute of Technology)

Abstract

Land subsidence in Changzhou City in the central Yangtze River Delta of China poses a serious threat to the safety of the environment and infrastructures. Excessive groundwater withdrawal, rapid urbanisation and industrial activities contribute to land subsidence in this area. In this study, we used the multi-temporal InSAR (MT-InSAR) technique to describe the spatiotemporal characteristics of land subsidence in Changzhou. Twenty-five ENVISAT ASAR and 29 TerraSAR-X images acquired from 2004 to 2013 were used to determine the rate and temporal evolution of land subsidence. We used the ERA-Interim model instead of spatiotemporal filtering in traditional MT-InSAR to mitigate the atmospheric phase screen. The InSAR-derived results were evaluated by comparing data from three time series methods and different bands (C and X bands), and accuracy was validated through levelling surveys and GPS measurements. For three regions, a distinct subsidence pattern was observed in major industrial areas with a maximum subsidence rate of up to − 39.9 mm/year. We also characterised the spatiotemporal variations of land subsidence in major industrial areas in Changzhou. The deformation of large-scale man-made linear features, namely high-speed railways, highway networks and a bridge, was analysed. The spatiotemporal characteristics and possible reasons for the observed subsidence were discussed to provide a reference for future urban development planning in Changzhou.

Suggested Citation

  • Bangyan Zhu & Zhengwei Chu & Fei Shen & Wei Tang & Bin Wang & Xiao Wang, 2019. "Land subsidence (2004–2013) in Changzhou in Central Yangtze River delta revealed by MT-InSAR," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 97(1), pages 379-394, May.
  • Handle: RePEc:spr:nathaz:v:97:y:2019:i:1:d:10.1007_s11069-019-03650-z
    DOI: 10.1007/s11069-019-03650-z
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    References listed on IDEAS

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    1. Gabriela Siles & Juan Alcérreca-Huerta & Penélope López-Quiroz & Jaime Hernández, 2015. "On the potential of time series InSAR for subsidence and ground rupture evaluation: application to Texcoco and Cuautitlan–Pachuca subbasins, northern Valley of Mexico," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 79(2), pages 1091-1110, November.
    2. Mingzhou Wang & Tao Li & Liming Jiang, 2016. "Monitoring reclaimed lands subsidence in Hong Kong with InSAR technique by persistent and distributed scatterers," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 82(1), pages 531-543, May.
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