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TitleMonitoring of land surface subsidence using persistent scatterer interferometry techniques and ground truth data in arid and semi-arid regions, the case of Remah, UAE
AuthorEl Kamali, M; Papoutsis, I; Loupasakis, C; Abuelgasim, A; Omari, K; Kontoes, C
SourceScience of the Total Environment vol. 776, 145946, 2021 p. 1-11, Open Access logo Open Access
Alt SeriesNatural Resources Canada, Contribution Series 20200773
Mediapaper; on-line; digital
File formatpdf
AreaRemah; United Arab Emirates
Lat/Long WENS 55.2000 55.5000 24.2000 24.0000
Subjectsgeophysics; hydrogeology; Agriculture; Nature and Environment; Health and Safety; subsidence; subsidence rates; deformation; groundwater resources; groundwater regimes; water utilization; climate; remote sensing; satellite imagery; water table; water levels; resource management; Sentinel-1; geological hazards; Parallelized-Persistent Scatterer Interferometry (P-PSI) technique
Illustrationslocation maps; stratigraphic columns; stratigraphic charts; photographs; graphs; plots
Released2021 02 18
AbstractThe United Arab Emirates (UAE) is located in an arid desert climate with very limitedwater resources and scarce rainfall. Along with the fast development of the country, thewater demand for agriculture, industrial, and domestic purposes increased and led to diminishing groundwater resources. In this study, we explore the land surface deformations due to groundwater overexploitation in the agricultural area of Remah by analyzing Sentinel-1 data between 2015 and 2019 with the novel Parallelized-Persistent Scatterer Interferometry (P-PSI) technique. The detected land surface deformations have been correlated to the recorded groundwater levels at nearby water wells. This study detected land surface deformations in a form of an extensive subsidence bowl (with 28.5 km in diameter) with a maximum subsidence rate of 40 mm/year and a standard deviation within the bowl of less than 2 mm/year. The detected subsidence was associated with a 12 m drop in the water table level within the study area. The Persistent Scatterers with the highest deformations rate were spatially correlated with the depression cone of the groundwater level. These findings provide useful insights in understanding the groundwater regime of the area and have an important role in assessing regional hazards and driving mitigation measures towards managing uncontrolled groundwater overexploitation for sustainable management of groundwater resources.

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