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Drought-driven transient aquifer compaction imaged using multitemporal satellite radar interferometry

2011; Geological Society of America; Volume: 39; Issue: 6 Linguagem: Inglês

10.1130/g31900.1

1943-2682

Pablo J. González, José Fernández,

Groundwater and Watershed Analysis

Research Article| June 01, 2011 Drought-driven transient aquifer compaction imaged using multitemporal satellite radar interferometry Pablo J. González; Pablo J. González * Instituto de Astronomía y Geodesia (CSIC-UCM—Consejo Superior de Investigaciones Científicas–Universidad Complutense de Madrid), Facultad de Ciencias Matemáticas, Plaza de Ciencias, 3, Ciudad Universitaria, 28040 Madrid, Spain *Current address: Department of Earth Sciences, University of Western Ontario, Biological & Geological Sciences Building, London, Ontario N6A 5B7, Canada. Search for other works by this author on: GSW Google Scholar José Fernández José Fernández † Instituto de Astronomía y Geodesia (CSIC-UCM—Consejo Superior de Investigaciones Científicas–Universidad Complutense de Madrid), Facultad de Ciencias Matemáticas, Plaza de Ciencias, 3, Ciudad Universitaria, 28040 Madrid, Spain †Current address: Instituto de Geociencias (CSIC-UCM), Facultad de Ciencias Matemáticas, Plaza de Ciencias 3, Ciudad Universitaria, 28040 Madrid, Spain. Search for other works by this author on: GSW Google Scholar Geology (2011) 39 (6): 551–554. https://doi.org/10.1130/G31900.1 Article history received: 11 Nov 2010 rev-recd: 21 Jan 2011 accepted: 31 Jan 2011 first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Pablo J. González, José Fernández; Drought-driven transient aquifer compaction imaged using multitemporal satellite radar interferometry. Geology 2011;; 39 (6): 551–554. doi: https://doi.org/10.1130/G31900.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract In unconsolidated, heterogeneous aquifer systems, low rates of pore-pressure diffusion of applied effective stresses due to the drainage of thick, low-permeability, clay-rich layers with time constants of decades to centuries cause delayed, residual permanent compaction and land subsidence. Current application of satellite differential radar interferometry (DInSAR—differential interferometric synthetic aperture radar) to estimate aquifer hydraulic properties (compressibility and/or storage) in these systems is limited by the temporal availability of synthetic aperture radar data (1992–present). In this paper we study the degree of aquifer compaction due to water extraction using DInSAR through an example in southeast Spain. Ground deformation data indicate large-scale deformation and in particular the discovery of the highest rates of groundwater-related land subsidence recorded in Europe (>10 cm/yr), affecting the Guadalentín River basin (>200 km2), the largest tributary of the Segura River. Modeling of the ground surface time series of the Guadalentín Basin indicates that deformation is mainly driven by nonlinear time-delayed flow processes in the underlying aquifer. After a drought period (1990–1995), the aquifer responded with an exponential decay of the land subsidence (lasting ∼8 yr), suggesting transient groundwater pore-pressure flow. We show that multitemporal satellite radar interferometry analysis and its modeling can be a stimulating way to study nonlinear soil mechanics and groundwater flows at aquifers. A deeper understanding of such processes could help the management of water resources and land subsidence of unconsolidated coastal and Quaternary alluvial aquifers in a highly evolving climate region (the Mediterranean Sea and elsewhere). You do not have access to this content, please speak to your institutional administrator if you feel you should have access.