Journal of Central South University

, Volume 20, Issue 4, pp 1039–1046 | Cite as

Monitoring of reclamation-induced ground subsidence in Macao (China) using PSInSAR technique

  • Bo Hu (胡波)
  • Han-sheng Wang (汪汉胜)
  • Li-ming Jiang (江利明)
Article

Abstract

The long-term reclamation-induced ground subsidence in Macao, a coastal city of southern China was investigated. Persistent scatterer interferometry (PSI) technique was applied to retrieve the deformation rate in Macao during the period from April 2003 to August 2010 with a total of 41 scenes of descending ASAR data sets. The PSI-retrieved results show a relatively stable pattern in Macao Peninsula, Taipa Island and Coloane Island, with an average subsidence velocity of −3 mm/a. In contrast, relatively large subsidence rates are highlighted in Cotai area, a new reclamation land in 1990s, in which an average subsidence velocity is about −10 mm/a. A consistent relationship between the PSI results and the leveling measurements indicate that this PSI technique is an effective tool to monitor the reclamation-induced ground subsidence with a high accuracy and adequate spatial details. Accordingly, the valuable ground subsidence results generated by PSI can be used not only for early detection and remedial activities of potential settlement of building, but also for helping the local government to formulate regional sustainable development planning and decision-making in disaster prevention and mitigation.

Key words

persistent scatterer interferometry (PSI) Macao reclamation land ground subsidence 

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Copyright information

© Central South University Press and Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Bo Hu (胡波)
    • 1
  • Han-sheng Wang (汪汉胜)
    • 1
  • Li-ming Jiang (江利明)
    • 1
  1. 1.State Key Laboratory of Dynamical Geodesy (Institute of Geodesy and Geophysics, Chinese Academy of Sciences)WuhanChina

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