Abstract
Abstract. Multi-sensor advanced DInSAR analyses have been performed and compared with two GPS station measurements, in order to evaluate the land subsidence evolution in a 20-year period, in the Alto Guadalentín Basin where the highest rate of man-induced subsidence (> 10 cm yr−1) of Europe had been detected. The control mechanisms have been examined comparing the advanced DInSAR data with conditioning and triggering factors (i.e. isobaths of Plio-Quaternary deposits, soft soil thickness and piezometric level).
Highlights
Since the 1960s, the Alto Guadalentín Basin, where the city of Lorca is located, has been affected by severe changes of the groundwater level.The objectives of this work are (i) to quantify the cumulated displacements over a 20-year period with multi-sensor advanced DInSAR data, and (ii) to investigate the control mechanisms that could explain this land motion.The Alto Guadalentín Basin is located in south-eastern Spain, and it includes an aquifer system that covers an area of about 277 km2, constituted by Plio-Quaternary detrital and alluvial material including clays, sands and conglomerates; Miocene detritical with conglomerate and sand deposits; and locally Triassic carbonate rocks
The DInSAR displacement accuracies have been computed at local scale, by comparing them against Global Position System (GPS) measurements
This research shows that Advanced DInSAR multi-sensor data obtained from a large set of SAR images are effective in analysing the subsidence spatio-temporal evolution in a 20-year period over a wide area (277 km2)
Summary
Since the 1960s, the Alto Guadalentín Basin (south-eastern Spain), where the city of Lorca is located, has been affected by severe changes of the groundwater level.The objectives of this work are (i) to quantify the cumulated displacements over a 20-year period with multi-sensor advanced DInSAR data, and (ii) to investigate the control mechanisms that could explain this land motion.The Alto Guadalentín Basin is located in south-eastern Spain, and it includes an aquifer system that covers an area of about 277 km, constituted by Plio-Quaternary detrital and alluvial material including clays, sands and conglomerates; Miocene detritical with conglomerate and sand deposits; and locally Triassic carbonate rocks. Since the 1960s, the Alto Guadalentín Basin (south-eastern Spain), where the city of Lorca is located, has been affected by severe changes of the groundwater level. The objectives of this work are (i) to quantify the cumulated displacements over a 20-year period with multi-sensor advanced DInSAR data, and (ii) to investigate the control mechanisms that could explain this land motion. The Alto Guadalentín Basin is located in south-eastern Spain, and it includes an aquifer system that covers an area of about 277 km, constituted by Plio-Quaternary detrital and alluvial material including clays, sands and conglomerates; Miocene detritical with conglomerate and sand deposits; and locally Triassic carbonate rocks. R. Bonì et al.: Application of multi-sensor advanced DInSAR analysis tem exploitation that led it to declare temporarily overexploited in 1987 (CHS, 2006)
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