Monitoring an earthfill dam using differential SAR interferometry: La Pedrera dam, Alicante, Spain

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Title: Monitoring an earthfill dam using differential SAR interferometry: La Pedrera dam, Alicante, Spain
Authors: Tomás, Roberto | Cano, Miguel | Garcia-Barba, Javier | Vicente-Guijalba, Fernando | Herrera García, Gerardo | Lopez-Sanchez, Juan M. | Mallorquí Franquet, Jordi J.
Research Group/s: Ingeniería del Terreno y sus Estructuras (InTerEs) | Señales, Sistemas y Telecomunicación
Center, Department or Service: Universidad de Alicante. Departamento de Ingeniería Civil | Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal
Keywords: DInSAR | Earthfill dam | Monitoring | Displacement | Surveying
Knowledge Area: Ingeniería del Terreno | Teoría de la Señal y Comunicaciones
Issue Date: 8-May-2013
Publisher: Elsevier
Citation: Engineering Geology. 2013, 157: 21-32. doi:10.1016/j.enggeo.2013.01.022
Abstract: Surface displacement at the dykes of La Pedrera reservoir (SE Spain) has been measured by satellite differential Synthetic Aperture Radar (SAR) interferometry. At the main dyke, a displacement of about 13 cm along the satellite line of sight has been estimated between August 1995 and May 2010, from a dataset composed by ERS-1, ERS-2 and Envisat-ASAR images. Two independent short-term processing tasks were also carried out with ERS-2/Envisat-ASAR (from June 2008 to May 2010) and TerraSAR-X (from August 2008 to June 2010) images which have shown similar spatial and temporal displacement patterns. The joint analysis of historical instrument surveys and DInSAR-derived data has allowed the identification of a long-term deformation process which is reflected at the dam's surface and is also clearly recognizable in the inspection gallery. The plausible causes of the displacements measured by DInSAR are also discussed in the paper. Finally, DInSAR data have been used to compute the long-term settlement of La Pedrera dam, showing a good agreement with external studies. Consequently, this work demonstrates the integration of DInSAR with in-situ techniques which helps provide a complete spatial vision of the displacements in the dam thereby helping to differentiate the causal mechanisms.
Sponsor: This work has been supported by the Spanish Government under project TEC2011-28201-C02, by the University of Alicante under projects VIGROB-157 and VIGROB-114, by the Generalitat Valenciana under project BEST-2011/225 and by the Agencia de Ciencia y Tecnología de la Región de Murcia project 15224/PI/10.
ISSN: 0013-7952 (Print) | 1872-6917 (Online)
DOI: 10.1016/j.enggeo.2013.01.022
Language: eng
Type: info:eu-repo/semantics/article
Peer Review: si
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INV - SST - Artículos de Revistas

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