Modeling the two- and three-dimensional displacement field in Lorca, Spain, subsidence and the global implications



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Fernandez, Jose and Prieto, Juan F. and Escayo, Joaquin and Camacho, Antonio G. and Luzón, Francisco and Tiampo, Kristy F. and Palano, Mimmo and Abajo, Tamara and Pérez, Enrique and Velasco, Jesus and Herrero, Tomas and Bru, Guadalupe and Molina, Iñigo and López, Juan and Rodríguez Velasco, Gema and Gómez, Israel and Mallorquí, Jordi J. (2018) Modeling the two- and three-dimensional displacement field in Lorca, Spain, subsidence and the global implications. Scientific Reports, 8 (1). ISSN 2045-2322

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Land subsidence associated with overexploitation of aquifers is a hazard that commonly affects large areas worldwide. The Lorca area, located in southeast Spain, has undergone one of the highest subsidence rates in Europe as a direct consequence of long-term aquifer exploitation. Previous studies carried out on the region assumed that the ground deformation retrieved from satellite radar interferometry corresponds only to vertical displacement. Here we report, for the first time, the two- and three-dimensional displacement field over the study area using synthetic aperture radar (SAR) data from Sentinel-1A images and Global Navigation Satellite System (GNSS) observations. By modeling this displacement, we provide new insights on the spatial and temporal evolution of the subsidence processes and on the main governing mechanisms. Additionally, we also demonstrate the importance of knowing both the vertical and horizontal components of the displacement to properly characterize similar hazards. Based on these results, we propose some general guidelines for the sustainable management and monitoring of land subsidence related to anthropogenic activities

Item Type:Article
Uncontrolled Keywords:Land subsidence, Displacement modeling, Three-dimensional displacement, Two-dimensional displacement
Subjects:Sciences > Geology > Geodynamics
Sciences > Mathematics > Geodesy
Sciences > Mathematics > Operations research
ID Code:55157
Deposited On:06 May 2019 17:33
Last Modified:07 May 2019 11:16

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