Béjar Pizarro, Marta, Ezquerro Martín, Pablo, Herrera García, Gerardo, Tomás, Roberto, Guardiola-Albert, Carolina, Ruiz Hernández, José María, Marchamalo Sacristán, Miguel, Martínez Marín, Rubén
Evaluation of the potential of InSAR time series to study the spatio-temporal evolution of piezometric levels in the Madrid aquifer
Béjar-Pizarro, M., Ezquerro Martín, P., Herrera, G., Tomás, R., Guardiola-Albert, C., Ruiz Hernández, J. M., Marchamalo Sacristán, M., and Martínez Marín, R.: Evaluation of the potential of InSAR time series to study the spatio-temporal evolution of piezometric levels in the Madrid aquifer, Proc. IAHS, 372, 29-32, doi:10.5194/piahs-372-29-2015, 2015
URI: http://hdl.handle.net/10045/51666
DOI: 10.5194/piahs-372-29-2015
ISSN: 2199-899X
Abstract: 
The Tertiary detritic aquifer of Madrid (TDAM), with an average thickness of 1500 m and a heterogeneous, anisotropic structure, supplies water to Madrid, the most populated city of Spain (3.2 million inhabitants in the metropolitan area). Besides its complex structure, a previous work focused in the north-northwest of Madrid city showed that the aquifer behaves quasi elastically trough extraction/recovery cycles and ground uplifting during recovery periods compensates most of the ground subsidence measured during previous extraction periods (Ezquerro et al., 2014). Therefore, the relationship between ground deformation and groundwater level through time can be simulated using simple elastic models. In this work, we model the temporal evolution of the piezometric level in 19 wells of the TDAM in the period 1997–2010. Using InSAR and piezometric time series spanning the studied period, we first estimate the elastic storage coefficient (Ske) for every well. Both, the Ske of each well and the average Ske of all wells, are used to predict hydraulic heads at the different well locations during the study period and compared against the measured hydraulic heads, leading to very similar errors when using the Ske of each well and the average Ske of all wells: 14 and 16 % on average respectively. This result suggests that an average Ske can be used to estimate piezometric level variations in all the points where ground deformation has been measured by InSAR, thus allowing production of piezometric level maps for the different extraction/recovery cycles in the TDAM.
Keywords:InSAR time series, Spatio-temporal evolution, Piezometric levels, Madrid aquifer
Copernicus Publications
info:eu-repo/semantics/article