Persistent Scatterer Interferometry subsidence data exploitation using spatial tools: The Vega Media of the Segura River Basin case study

Tomás, Roberto; Herrera, Gerardo; Cooksley, G.; Mulas, J.

doi:10.1016/j.jhydrol.2011.01.057

Cited by 29 publications

(33 citation statements)

References 22 publications

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“…The results reveal that the peaks of average LOS velocity are consistent with the maximum thickness of clayey-silty deposits. As a consequence, the thickness of the upper clayey-silty deposits seems to be a controlling factor of the rate of ground motion, as observed in others case histories, such as Murcia, Vega Media of the Segura River Basin, and Alto Guadalentín Basin in Spain [46][47][48], and along the Venice coast and Sibari plain in Italy [49,50].…”

Section: Comparison Between Ground Motion and Hydrogeological Settingssupporting

confidence: 54%

Methodology for Detection and Interpretation of Ground Motion Areas with the A-DInSAR Time Series Analysis

2016

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Recent improvement to Advanced Differential Interferometric SAR (A-DInSAR) time series quality enhances the knowledge of various geohazards. Ground motion studies need an appropriate methodology to exploit the great potential contained in the A-DInSAR time series. Here, we propose a methodology to analyze multi-sensors and multi-temporal A-DInSAR data for the geological interpretation of areas affected by land subsidence/uplift and seasonal movements.The methodology was applied in the plain area of the Oltrepo Pavese (Po Plain, Italy) using ERS-1/2 and Radarsat data, processed using the SqueeSAR™ algorithm, and covering time spans, respectively, from 1992 to 2000 and from 2003 to 2010. The test area is a representative site of the Po Plain, affected by various geohazards and characterized by moderate rates of motion, ranging from −10 to 4 mm/yr. Different components of motion were recognized: linear, non-linear, and seasonal deformational behaviors. Natural and man-induced processes were identified such as swelling/shrinkage of clayey soils, land subsidence due to load of new buildings, moderate tectonic uplift, and seasonal ground motion due to seasonal groundwater level variations.

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Section: Comparison Between Ground Motion and Hydrogeological Settingssupporting

confidence: 54%

Methodology for Detection and Interpretation of Ground Motion Areas with the A-DInSAR Time Series Analysis

2016

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“…These problems have taken more relevance in a global climate change context that predicts intensive dry seasons over vulnerable areas [5,6]. Ground subsidence, accompanying aquifer system depletion, is a common hazard that has important social and economic repercussions [7]. The effect of piezometric level changes over aquifer systems and associated consolidation can be explained by Terzaghi's effective stress principle [8].…”

Section: Introductionmentioning

confidence: 99%

Groundwater and Subsidence Modeling Combining Geological and Multi-Satellite SAR Data over the Alto Guadalentín Aquifer (SE Spain)

et al. 2017

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In the current context of climate change, improving groundwater monitoring and management is an important issue for human communities in arid environments. The exploitation of groundwater resources can trigger land subsidence producing damage in urban structures and infrastructures. Alto Guadalentín aquifer system in SE Spain has been exploited since 1960 producing an average piezometric level drop of 150 m. This work presents a groundwater model that reproduces groundwater evolution during 52 years with an average error below 10%. The geometry of the model was improved introducing a layer of less permeable and deformable soft soils derived from InSAR deformation and borehole data. The resulting aquifer system history of the piezometric level has been compared with ENVISAT deformation data to calculate a first-order relationship between groundwater changes, soft soil thickness, and surface deformation. This relationship has been validated with the displacement data from ERS and CosmoSkyMed satellites. The resulting regression function is then used as an empirical subsidence model to estimate a first approximation of the deformation of the aquifer system since the beginning of the groundwater extraction, reaching 1 to 5.5 m in 52 years. These rough estimations highlight the limitations of the proposed empirical model, requiring the implementation of a coupled hydrogeomechanical model.

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“…However, neither method provides a level of detail that is sufficient to demonstrate (A) the actual rate of absolute or relative land level change at the present time, or (B) how changes in land level might vary through the region, both of which are required for assessments for the long term planning of flood risk management, as along the Thames estuary. For example, local geological controls on spatial variation in the rates of present-day land level change have been found in the Venice area of north-east Italy (Tosi et al, 2009), and in the Segura River Basin of south-east Spain (Tomas et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Geological interpretation of current subsidence and uplift in the London area, UK, as shown by high precision satellite-based surveying

Aldiss

Burke

Chacksfield

et al. 2014

Proceedings of the Geologists' Association

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Long term planning for flood risk management in coastal areas requires timely and reliable information on changes in land and sea levels. A high resolution map of current changes in land levels in the London and Thames estuary area has been generated by satellite-based persistent scatterer interferometry (PSI), aligned to absolute gravity (AG) and global positioning system (GPS) measurements. This map has been qualitatively validated by geological interpretation, which demonstrates a variety of controlling influences on the rates of land level change, ranging from near-surface to deep-seated mechanisms and from less than a decade to more than 100,000 years' duration.During the period 1997 to 2005, most of the region around the Thames estuary subsided between 0.9 and 1.5 mm a -1 on average, with subsidence of thick Holocene deposits being as fast as 2.1 mm a -1 . By contrast, parts of west and north London on the Midlands Microcraton subsided by less than 0.7 mm a -1 , and in places appear to have risen by about 0.3 mm a -1 . These rates of subsidence are close to values determined previously by studies of Quaternary sequences, but the combined GPS, AG and PSI land level change data demonstrate a new level of local geological control that was not previously resolvable.

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Persistent Scatterer Interferometry subsidence data exploitation using spatial tools: The Vega Media of the Segura River Basin case study

Cited by 29 publications

References 22 publications

Methodology for Detection and Interpretation of Ground Motion Areas with the A-DInSAR Time Series Analysis

Methodology for Detection and Interpretation of Ground Motion Areas with the A-DInSAR Time Series Analysis

Groundwater and Subsidence Modeling Combining Geological and Multi-Satellite SAR Data over the Alto Guadalentín Aquifer (SE Spain)

Geological interpretation of current subsidence and uplift in the London area, UK, as shown by high precision satellite-based surveying

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