RT Journal Article
T1 Analysis of Aquifer-System Deformation in the Doñana Natural Space (Spain) Using Unsupervised Cloud-Computed InSAR Data and Wavelet Analysis
A1 González Jiménez, Miguel
A1 Guardiola Albert, Carolina
A1 Ezquerro, Pablo
A1 Aguilera Alonso, Héctor
A1 Bejar Pizarro, Marta
A1 Naranjo Fernández, Nuria
A1 Bru, Guadalupe
A1 Herrera, G.
AB This work is focused on the Almonte-Marismas aquifer located within Doñana Natural Space (SW Spain); this aquifer is threatened by droughts, irrigation-driven groundwater overexploitation, urban use, and the potential reactivation of gas extraction and storage projects. We present ground deformation measurements from Sentinel-1 Interferometric Synthetic Aperture Radar (InSAR) data ranging from 1 to 2.5 cm, covering ∼2,500 km2 from 2014 to 2020. Detecting spatially distributed ground deformation over this agricultural area is challenging due to the low-coherence radar signals; consequently, the ground movement results are on the same order of magnitude as the errors associated with InSAR data. We have approached this issue by considering auxiliary information such as groundwater levels, climatic time series, and pumping rates and analyzing their spatio-temporal connections to ground displacements. We correlate InSAR and hydrogeological information through wavelet analysis, developing a Python package that allows applying the same methodology in other similar study areas. For the first time in the Doñana area, a significant relationship between distances to pumping wells and the displacement extent is detected. Moreover, other subsidence-related triggering factors are identified, such as the soil moisture balance, clay shrinking-swelling processes, and creep of geological formations. These results are highly valuable to support aquifer management decisions in the Doñana Natural Space; in this border region, three groundwater bodies were officially declared overexploited in 2020. Our findings provide a ground motion baseline assessment to help differentiate historical variations from any future anthropogenic effect in this complex marsh land ecosystem.
PB Wiley
SN 0043-1397
YR 2023
FD 2023-08-13
LK https://hdl.handle.net/20.500.14352/87707
UL https://hdl.handle.net/20.500.14352/87707
LA eng
NO National Youth Guarantee System
NO Tripartite Foundation for Training in Employment
NO Youth Employment Initiative (YEI)
NO European Social Fund (ESF)
NO European Union
NO Ministry of Ciencia e Innovación
NO IGME-CSIC
DS Docta Complutense
RD 17 dic 2025