A ground subsidence study based on DInSAR data: calibration of soil parameters and subsidence prediction in Murcia City (Spain)

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Title: A ground subsidence study based on DInSAR data: calibration of soil parameters and subsidence prediction in Murcia City (Spain)
Authors: Tomás, Roberto | Herrera García, Gerardo | Delgado, Jose | Lopez-Sanchez, Juan M. | Mallorquí Franquet, Jordi J. | Mulas de la Peña, Joaquín
Research Group/s: Ingeniería del Terreno y sus Estructuras (InTerEs) | Señales, Sistemas y Telecomunicación
Center, Department or Service: Universidad de Alicante. Departamento de Ingeniería de la Construcción, Obras Públicas e Infraestructura Urbana | Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal | Instituto Geológico y Minero de España. Área de Investigación en Peligrosidad y Riesgos Geológicos | Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions
Keywords: Subsidence | DInSAR | Model | Extensometer
Knowledge Area: Ingeniería Geológica | Teoría de la Señal y Comunicaciones
Issue Date: 2-Dec-2009
Publisher: Elsevier
Citation: TOMÁS JOVER, Roberto, et al. “A ground subsidence study based on DInSAR data: calibration of soil parameters and subsidence prediction in Murcia City (Spain)”. Engineering Geology. Vol. 111, Issues 1-4 (26 Febr. 2010). ISSN 0013-7952, pp. 19-30
Abstract: Subsidence is a hazard that affects wide areas in the world causing important economic costs annually. The City of Murcia (SE Spain) is affected by this phenomenon since the 90s. In this work, ground subsidence caused by aquifer overexploitation is remotely monitored with Persistent Scatterer Interferometry (PSI). In particular, the so-called Coherent Pixels Technique (CPT) has been applied to SAR images from ERS and ENVISAT satellites. The CPT displacement time series corresponding to the 1993–1995 period have been used to calibrate a proposed one-dimensional subsidence model. Hence, the CPT time series have been successfully used to retrieve physical parameters of the soil. Then the model has been used to predict the deformations for the period 1993–2007. The comparison between the predictions of the model and the actual subsidence time series for the 1995–2007 period provides an average absolute difference of 3.2 ± 2.5 mm. Despite the simplicity of the adopted 1D model, these results show the usefulness of the CPT derived displacement information to calibrate and validate numerical models of ground subsidence due to aquifer overexploitation, which can be used to predict the aquifer's response for future piezometric falls.
Sponsor: The SAR images used in this work were provided by the European Space Agency (ESA) in the framework of the EO Cat. 1-2494 project. This study was partially funded by the Spanish Ministry of Science and Technology and EU FEDER (Project TEC-2008-06764) and by the University of Alicante (Projects VIGROB-157 and VIGROB-184). The Instituto Geológico y Minero de España (IGME) and EMUASA were kind enough to provide piezometric and hydrological data.
URI: http://hdl.handle.net/10045/15369
ISSN: 0013-7952 (Print) | 1872-6917 (Online)
DOI: 10.1016/j.enggeo.2009.11.004
Language: eng
Type: info:eu-repo/semantics/article
Peer Review: si
Publisher version: http://dx.doi.org/10.1016/j.enggeo.2009.11.004
Appears in Collections:INV - INTERES - Artículos de Revistas
INV - SST - Artículos de Revistas

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