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Analysis of ground movements in Guayaquil (Ecuador) by means of G-POD service (A-DInSAR technique)

Abstract:

In this work a ground movement preliminary analysis in the metropolitan area of Guayaquil (Ecuador) has been realised by means of the A-DInSAR technique. For this purpose, SAR images of Envisat ASAR were processed between February 2003 and August 2005 through the free G-POD service. The results allowed to identify three important deformation zones, with average line-of-sight (LOS) velocities ranging from -19.2 to 10.1 mm/year. In addition, the accumulated deformations are between 24 and 52 mm. These ground movements are related to different geological processes: I) urban subsidence, II) floods and III) slope instabilities. This study illustrates the usefulness of G-POD service for realise A-DInSAR processing like preliminary analysis of geohazards associated to ground movements.