Mexico City subsidence observed with persistent scatterer InSAR

Batuhan Osmanoǧlu, Timothy H. Dixon, Shimon Wdowinski, Enrique Cabral-Cano, Yan Jiang

Research output: Contribution to journalArticle

173 Scopus citations

Abstract

We analyzed 23 satellite SAR (synthetic aperture radar) scenes using Persistent Scatter Interferometry (PSI) to study subsidence in Mexico City associated with groundwater withdrawal. The data were acquired by the Envisat ASAR system between January 2004 and July 2006. The spatial pattern of subsidence and the maximum subsidence rate (300 mm/year) are similar to earlier studies. Comparison to independent GPS data indicates RMS agreement between the two techniques of 6.9 mm/year, about the level expected based on joint data uncertainty. Significant annual variation in the GPS vertical data is not observed, suggesting minimal aquifer recharge during the rainy season, and justifying a simple linear model of phase variation through time for the PSI analysis.

Original languageEnglish (US)
Pages (from-to)1-12
Number of pages12
JournalInternational Journal of Applied Earth Observation and Geoinformation
Volume13
Issue number1
DOIs
StatePublished - Feb 1 2011

Keywords

  • GPS
  • Interferometry
  • Mexico city
  • Persistent scatterer interferometry (PSI)
  • Subsidence
  • Synthetic aperture radar (SAR)

ASJC Scopus subject areas

  • Global and Planetary Change
  • Earth-Surface Processes
  • Computers in Earth Sciences
  • Management, Monitoring, Policy and Law

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