3D groundwater flow and deformation modelling of Madrid aquifer

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Title: 3D groundwater flow and deformation modelling of Madrid aquifer
Authors: Bonì, Roberta | Meisina, Claudia | Teatini, Pietro | Zucca, Francesco | Zoccarato, Claudia | Franceschini, Andrea | Ezquerro Martín, Pablo | Béjar Pizarro, Marta | Fernández-Merodo, José Antonio | Guardiola-Albert, Carolina | Pastor Navarro, José Luis | Tomás, Roberto | Herrera García, Gerardo
Research Group/s: Ingeniería del Terreno y sus Estructuras (InTerEs)
Center, Department or Service: Universidad de Alicante. Departamento de Ingeniería Civil
Keywords: Seasonal deformation | Land subsidence | 3D Finite Element (FE) groundwater and geomechanical model | A-DInSAR technique | Groundwater management
Knowledge Area: Ingeniería del Terreno
Issue Date: 28-Feb-2020
Publisher: Elsevier
Citation: Journal of Hydrology. 2020, 585: 124773. doi:10.1016/j.jhydrol.2020.124773
Abstract: A novel methodological approach to calibrate and validate three-dimensional (3D) finite element (FE) groundwater flow and geomechanical models has been implemented using Advanced Differential Interferometric SAR (A-DInSAR) data. In particular, we show how A-DInSAR data can be effectively used to (1) constrain the model set-up in evaluating the areal influence of the wellfield and (2) characterise the aquifer system, specifically the storage coefficient values, which represents a fundamental step in managing groundwater resources. The procedure has been tested to reconstruct the surface vertical and horizontal movements caused by the Manzanares-Jarama wellfield located northwest of Madrid (Spain). The wellfield was used to supply freshwater during major droughts over the period between 1994 and 2010. Previous A-DInSAR outcomes obtained by ERS-1/2 and ENVISAT acquisitions clearly revealed the seasonality of the land displacements associated to the withdrawal and recovery cycles that characterized the wellfield development. A time-lag of about one month, which is in the order of the time span between two SAR acquisitions, between the hydraulic head changes and the displacements has been detected in this site by a wavelet analysis of A-DInSAR and piezometer time series. The negligible delay between the forcing factor and the system response and the complete subsidence recovery when piezometric head recovers supported the understanding of a minor role played by the pore pressure propagation within clay layers and the almost perfectly elastic behavior of the system (viscosity is negligible), respectively. The developed geomechanical model satisfactorily reproduces the pumping-induced deformations with a Root Mean Square Error (RMSE) between observed and simulated land displacements in the order of 0.1-0.3 mm. The results give insights about the approach benefits in deeply understanding the spatio-temporal aquifer-system response to the management of this strategic water resource for Madrid.
Sponsor: The activity has been developed within the scientific collaboration established in the framework of the UNESCO Land Subsidence International Initiative (LaSII - https://www.landsubsidence-unesco.org/). The research was funded by University of Pavia in the framework of a research grant award “assegno di tipo A premiale” for research activities at the Dept. of Earth and Environmental Sciences, within the research project entitled “Sustainable groundwater resources management by integrating A-DInSAR derived monitoring and flow modeling results” assigned to Roberta Bonì in March 2019. This research was partially funded by the Spanish Ministry of Economy, Industry and Competitiveness (MINECO), the State Agency of Research (AEI), and the European Funds for Regional Development (FEDER) under project TEC2017-85244-C2-1-P.
URI: http://hdl.handle.net/10045/103419
ISSN: 0022-1694 (Print) | 1879-2707 (Online)
DOI: 10.1016/j.jhydrol.2020.124773
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2020 Published by Elsevier B.V.
Peer Review: si
Publisher version: https://doi.org/10.1016/j.jhydrol.2020.124773
Appears in Collections:INV - INTERES - Artículos de Revistas

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