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Time series analysis of Mexico City surface deformation

Batuhan Osmanoglu(1), Tim Dixon(1) and Shimon Wdowinski(1)

(1) University of Miami - RSMAS, 4600 Rickenbacker CSWY, 33149, United States


In this study we investigate the link between surface deformation and ground water withdrawal in excess of recharge in Mexico City, using the PSInSAR (persistent scatterer InSAR) technique. The success of PSInSAR is well known in urban areas for detection of ground deformation. We use 23 Envisat acquisitions to obtain time-series of surface deformation between January 2004 and July 2006 over the study area. Besides the prominent high subsidence rates around the airport, we observe a relationship between surface motion and average monthly precipitation. In several parts of city, surface motion lags precipitation by about 3-4 months and is limited by the amount of rain. We are investigating hydrological processes in the study area to better understand the relation between rainfall and surface deformation using finite element modeling. Preliminary results of this study will be presented at the meeting.


Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry