Options
Notti, D.
Loading...
Preferred name
Notti, D.
1 results
Now showing 1 - 1 of 1
- PublicationRestrictedTwenty-year advanced DInSAR analysis of severe land subsidence: The Alto Guadalentín Basin (Spain) case study(2015)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;Bonì, R.; Department of Earth and Environmental Science, University of Pavia, Via Ferrata 1, 27100 Pavia, 9 Italy ;Herrera, G.; Geohazards InSAR laboratory and modeling group. Instituto Geológico y Minero de España 12 (IGME), C/. Alenza 1, 28003 Madrid, Spain ;Meisina, C.; Department of Earth and Environmental Science, University of Pavia, Via Ferrata 1, 27100 Pavia, 9 Italy ;Notti, D.; Department of Earth and Environmental Science, University of Pavia, Via Ferrata 1, 27100 Pavia, 9 Italy ;Béjar-Pizarro, M.; Geohazards InSAR laboratory and modeling group. Instituto Geológico y Minero de España 12 (IGME), C/. Alenza 1, 28003 Madrid, Spain ;Zucca, F.; Department of Earth and Environmental Science, University of Pavia, Via Ferrata 1, 27100 Pavia, 9 Italy ;González, P. J.; Institute of Geophysics and Tectonics. School of Earth and Environment. University of Leeds, 19 Leeds, LS2 9JT, United Kingdom ;Palano, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia ;Tomás, R.; Geohazards InSAR laboratory and modeling group. Instituto Geológico y Minero de España 12 (IGME), C/. Alenza 1, 28003 Madrid, Spain ;Fernández, J.; Instituto de Geociencias (CSIC, UCM), Plaza de Ciencias 3, Ciudad Universitaria, 28040 Madrid, 25 Spain ;Fernández-Merodo, J. A.; Geohazards InSAR laboratory and modeling group. Instituto Geológico y Minero de España 12 (IGME), C/. Alenza 1, 28003 Madrid, Spain ;Mulas, J.; Unidad Asociada de investigación IGME-UA de movimientos del terreno mediante interferometría 15 radar (UNIRAD),Universidad de Alicante, P.O. Box 99, 03080 Alicante, Spain ;Aragón, R.; Unidad Asociada de investigación IGME-UA de movimientos del terreno mediante interferometría 15 radar (UNIRAD),Universidad de Alicante, P.O. Box 99, 03080 Alicante, Spain ;Guardiola-Albert, C.; Geohazards InSAR laboratory and modeling group. Instituto Geológico y Minero de España 12 (IGME), C/. Alenza 1, 28003 Madrid, Spain ;Mora, O.; Altamira Information, C/. Còrsega 381-387, 08037 Barcelona, Spain; ; ; ; ; ; ; ; ; ; ; ; ; ; A twenty-year period of severe land subsidence evolution in the Alto Guadalentín Basin (southeast Spain) is monitored using multi-sensor SAR images, processed by advanced differential interferometric synthetic aperture radar (DInSAR) techniques. The SAR images used in this study consist of four datasets acquired by ERS-1/2, ENVISAT, ALOS and COSMO-SkyMed satellites between 1992 and 2012. The integration of ground surface displacement maps retrieved for different time periods allows us to quantify up to 2.50 m of cumulated displacements that occurred between 1992 and 2012 in the Alto Guadalentín Basin. DInSAR results were locally compared with global positioning system (GPS) data available for two continuous stations located in the study area, demonstrating the high consistency of local vertical motion measurements between the two different surveying techniques. An average absolute error of 4.6 ± 4 mm for the ALOS data and of 4.8 ± 3.5 mm for the COSMO-SkyMed data confirmed the reliability of the analysis. The spatial analysis of DInSAR ground surface displacement reveals a direct correlation with the thickness of the compressible alluvial deposits. Detected ground subsidence in the past 20 years is most likely a consequence of a 100–200 m groundwater level drop that has persisted since the 1970s due to the overexploitation of the Alto Guadalentín aquifer system. The negative gradient of the pore pressure is responsible for the extremely slow consolidation of a very thick (> 100 m) layer of fine-grained silt and clay layers with low vertical hydraulic permeability (approximately 50 mm/h) wherein the maximum settlement has still not been reached.240 39