Journal
REMOTE SENSING
Volume 9, Issue 12, Pages -Publisher
MDPI AG
DOI: 10.3390/rs9121291
Keywords
DInSAR; GEP; SBAS; landslides; human-induced subsidence; hazard identification
Categories
Funding
- Spanish Juan de la Cierva grants
- FEDER [CGL2015-67130-C2-1-R]
- Spanish Ministry of Economy and Competitiveness [CGL2015-67130-C2-1-R]
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The analysis of remote sensing data to assess geohazards is being improved by web-based platforms and collaborative projects, such as the Geohazard Exploitation Platform (GEP) of the European Space Agency (ESA). This paper presents the evaluation of a surface velocity map that is generated by this platform. The map was produced through an unsupervised Multi-temporal InSAR (MTI) analysis applying the Parallel-SBAS (P-SBAS) algorithm to 25 ENVISAT satellite images from the South of Spain that were acquired between 2003 and 2008. This analysis was carried out using a service implemented in the GEP called SBAS InSAR. Thanks to the map that was generated by the SBAS InSAR service, we identified processes not documented so far; provided new monitoring data in places affected by known ground instabilities; defined the area affected by these instabilities; and, studied a case where GEP could have been able to help in the forecast of a slope movement reactivation. This amply demonstrates the reliability and usefulness of the GEP, and shows how web-based platforms may enhance the capacity to identify, monitor, and assess hazards that are associated to geological processes.
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