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Multi-Sensor InSAR Assessment of Ground Deformations around Lake Mead and Its Relation to Water Level Changes

1
Department of Physical Geography, Stockholm University, SE-106 91 Stockholm, Sweden
2
Baltic Sea Centre, Stockholm University, SE-106 91 Stockholm, Sweden
*
Author to whom correspondence should be addressed.
Academic Editor: Alex Hay-Man Ng
Remote Sens. 2021, 13(3), 406; https://doi.org/10.3390/rs13030406
Received: 21 December 2020 / Revised: 16 January 2021 / Accepted: 19 January 2021 / Published: 25 January 2021
Changes in subsurface water resources might alter the surrounding ground by generating subsidence or uplift, depending on geological and hydrogeological site characteristics. Improved understanding of the relationships between surface water storage and ground deformation is important for design and maintenance of hydraulic facilities and ground stability. Here, we construct one of the longest series of Interferometric Synthetic Aperture Radar (InSAR) to date, over twenty-five years, to study the relationships between water level changes and ground surface deformation in the surroundings of Lake Mead, United States, and at the site of the Hoover Dam. We use the Small Baseline Subset (SBAS) and Permanent scatterer interferometry (PSI) techniques over 177 SAR data, encompassing different SAR sensors including ERS1/2, Envisat, ALOS (PALSAR), and Sentinel-1(S1). We perform a cross-sensor examination of the relationship between water level changes and ground displacement. We found a negative relationship between water level change and ground deformation around the reservoir that was consistent across all sensors. The negative relationship was evident from the long-term changes in water level and deformation occurring from 1995 to 2014, and also from the intra-annual oscillations of the later period, 2014 to 2019, both around the reservoir and at the dam. These results suggest an elastic response of the ground surface to changes in water storage in the reservoir, both at the dam site and around the reservoir. Our study illustrates how InSAR-derived ground deformations can be consistent in time across sensors, showing the potential of detecting longer time-series of ground deformation. View Full-Text
Keywords: InSAR; Sentinel-1; ERS; Envisat; ALOS; SBAS; PSI; GPS; lake mead; hoover dam; water level change; ground deformation InSAR; Sentinel-1; ERS; Envisat; ALOS; SBAS; PSI; GPS; lake mead; hoover dam; water level change; ground deformation
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MDPI and ACS Style

Darvishi, M.; Destouni, G.; Aminjafari, S.; Jaramillo, F. Multi-Sensor InSAR Assessment of Ground Deformations around Lake Mead and Its Relation to Water Level Changes. Remote Sens. 2021, 13, 406. https://doi.org/10.3390/rs13030406

AMA Style

Darvishi M, Destouni G, Aminjafari S, Jaramillo F. Multi-Sensor InSAR Assessment of Ground Deformations around Lake Mead and Its Relation to Water Level Changes. Remote Sensing. 2021; 13(3):406. https://doi.org/10.3390/rs13030406

Chicago/Turabian Style

Darvishi, Mehdi, Georgia Destouni, Saeid Aminjafari, and Fernando Jaramillo. 2021. "Multi-Sensor InSAR Assessment of Ground Deformations around Lake Mead and Its Relation to Water Level Changes" Remote Sensing 13, no. 3: 406. https://doi.org/10.3390/rs13030406

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