Deciphering the origin of groundwater inflow into the Talave tunnel (SE Spain)

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, inter...

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Autores: Hornero, Jorge, Manzano Arellano, María del Sol, Custodio, Emilio
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2021
País:España
Institución:Universidad Politécnica de Cartagena(UPCT)
Repositorio:Repositorio Digital UPCT
OAI Identifier:oai:repositorio.upct.es:10317/13354
Acceso en línea:http://hdl.handle.net/10317/13354
https://www.sciencedirect.com/science/article/pii/S0048969721029752?via%3Dihub
Access Level:acceso abierto
Palabra clave:Talave tunnel
Groundwater level drawdown
Groundwater inflows origin
Hydrochemistry
Water isotopes
Explotación de Minas
2503 Geoquímica
2506.05 Hidrogeología
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spelling Deciphering the origin of groundwater inflow into the Talave tunnel (SE Spain)Hornero, JorgeManzano Arellano, María del SolCustodio, EmilioTalave tunnelGroundwater level drawdownGroundwater inflows originHydrochemistryWater isotopesExplotación de Minas2503 Geoquímica2506.05 HidrogeologíaThe 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 between 2014 and 2018 from discrete and integrated discharge to the tunnel. Attaining both goals benefited of recent studies on groundwater recharge and functioning in the Alcadozo aquifer. Discharge flows stabilized in the early 2000s. 340 hm3 were drained between 1969 and 2016, producing a piezometric drawdown between 15 and 120 m along the tunnel. The main inflow zones correspond to tectonic fractures concentrated in the middle and southern sections of the tunnel. The existence of a hydrogeological divide between the Júcar and the Segura river basins some 3 km to the N of the watershed divide implies that all groundwater comes from the Segura hydrogeological basin. The isotopes suggest that groundwater comes mainly from regional flow lines originated to the W of the tunnel, together with some local recharge. The effects of tunneling can be used to assess the impacts of imminent groundwater development planned by the Basin Authority.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.ElsevierUniversidad Politécnica de CataluñaInstituto Geológico y Minero de EspañaMinisterio de Ciencia e InnovaciónInstituto Geológico y Minero de España202420242021info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfapplication/pdfhttp://hdl.handle.net/10317/13354https://www.sciencedirect.com/science/article/pii/S0048969721029752?via%3Dihubreponame:Repositorio Digital UPCTinstname:Universidad Politécnica de Cartagena(UPCT)Inglésinfo:eu-repo/grantAgreement/CICYT//CLG2009-12910-C03CLG2009-12910-C03info:eu-repo/semantics/openAccessoai:repositorio.upct.es:10317/133542026-05-15T06:39:02Z
dc.title.none.fl_str_mv Deciphering the origin of groundwater inflow into the Talave tunnel (SE Spain)
title Deciphering the origin of groundwater inflow into the Talave tunnel (SE Spain)
spellingShingle Deciphering the origin of groundwater inflow into the Talave tunnel (SE Spain)
Hornero, Jorge
Talave tunnel
Groundwater level drawdown
Groundwater inflows origin
Hydrochemistry
Water isotopes
Explotación de Minas
2503 Geoquímica
2506.05 Hidrogeología
title_short Deciphering the origin of groundwater inflow into the Talave tunnel (SE Spain)
title_full Deciphering the origin of groundwater inflow into the Talave tunnel (SE Spain)
title_fullStr Deciphering the origin of groundwater inflow into the Talave tunnel (SE Spain)
title_full_unstemmed Deciphering the origin of groundwater inflow into the Talave tunnel (SE Spain)
title_sort Deciphering the origin of groundwater inflow into the Talave tunnel (SE Spain)
dc.creator.none.fl_str_mv Hornero, Jorge
Manzano Arellano, María del Sol
Custodio, Emilio
author Hornero, Jorge
author_facet Hornero, Jorge
Manzano Arellano, María del Sol
Custodio, Emilio
author_role author
author2 Manzano Arellano, María del Sol
Custodio, Emilio
author2_role author
author
dc.contributor.none.fl_str_mv Universidad Politécnica de Cataluña
Instituto Geológico y Minero de España
Ministerio de Ciencia e Innovación
Instituto Geológico y Minero de España
dc.subject.none.fl_str_mv Talave tunnel
Groundwater level drawdown
Groundwater inflows origin
Hydrochemistry
Water isotopes
Explotación de Minas
2503 Geoquímica
2506.05 Hidrogeología
topic Talave tunnel
Groundwater level drawdown
Groundwater inflows origin
Hydrochemistry
Water isotopes
Explotación de Minas
2503 Geoquímica
2506.05 Hidrogeología
description 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 between 2014 and 2018 from discrete and integrated discharge to the tunnel. Attaining both goals benefited of recent studies on groundwater recharge and functioning in the Alcadozo aquifer. Discharge flows stabilized in the early 2000s. 340 hm3 were drained between 1969 and 2016, producing a piezometric drawdown between 15 and 120 m along the tunnel. The main inflow zones correspond to tectonic fractures concentrated in the middle and southern sections of the tunnel. The existence of a hydrogeological divide between the Júcar and the Segura river basins some 3 km to the N of the watershed divide implies that all groundwater comes from the Segura hydrogeological basin. The isotopes suggest that groundwater comes mainly from regional flow lines originated to the W of the tunnel, together with some local recharge. The effects of tunneling can be used to assess the impacts of imminent groundwater development planned by the Basin Authority.
publishDate 2021
dc.date.none.fl_str_mv 2021
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10317/13354
https://www.sciencedirect.com/science/article/pii/S0048969721029752?via%3Dihub
url http://hdl.handle.net/10317/13354
https://www.sciencedirect.com/science/article/pii/S0048969721029752?via%3Dihub
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/CICYT//CLG2009-12910-C03
CLG2009-12910-C03
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositorio Digital UPCT
instname:Universidad Politécnica de Cartagena(UPCT)
instname_str Universidad Politécnica de Cartagena(UPCT)
reponame_str Repositorio Digital UPCT
collection Repositorio Digital UPCT
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300724

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