Deciphering the origin of groundwater inflow into the Talave tunnel (SE Spain)
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This study is part of the work undertaken under projects REDESAC (CLG2009-12910-C03), funded by the Spanish Ministry of Science and Innovation, and ALCAMOD (grant No. 2099) and “Networks Control and Infrastructures” (grant No. 2823), funded by the Geological Survey of Spain. The authors thank the Tajo river Basin Authority for providing basic historical information and data, and the two anonymous reviewers that contributed to improve the work.Realizado en/con
Universidad Politécnica de Cataluña; Instituto Geológico y Minero de EspañaFecha de publicación
2021-10-01Editorial
ElsevierCita bibliográfica
Jorge Hornero, Marisol Manzano, Emilio Custodio, Deciphering the origin of groundwater inflow into the Talave tunnel (SE Spain), Science of The Total Environment, Volume 789, 2021, 147904, ISSN 0048-9697, https://doi.org/10.1016/j.scitotenv.2021.147904.Revisión por pares
siPalabras clave
Talave tunnelGroundwater level drawdown
Groundwater inflows origin
Hydrochemistry
Water isotopes
Localización
Resumen
The Talave tunnel (TT) is an infrastructure of a major water transfer from the Tajo river basin (center Spain) to the Segura river basin (SE Spain), crossing the Júcar river basin. The tunnel was drilled between 1969 and 1978. It is 32 km long, N/NW-S/SE oriented, has a maximum depth of 320 m, intersects several aquifers, and its southern stretch follows the eastern boundary of the Alcadozo aquifer. The TT drilling perturbed groundwater flow in two river basins, and the induced groundwater inlets generated social and administrative concern lasting until today. The main objectives of this paper are understanding the historical and current tunnel-massif hydrodynamic relationships, and deciphering the origin of groundwater inflow into the tunnel. The first objective was approached analyzing the discharge flow evolution since the drilling until 2016, together with old (1970s) and recent (2014–2017) piezometric data. For the second objective, hydrochemical and isotopic data were generated ...
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