The catastrophic effects of groundwater intensive exploitation and Megadrought on aquifers in Central Chile: Global change impact projections in water resources based on groundwater balance modeling

[EN] Central Chile is undergoing its most severe drought since 2010, affecting ecosystems, water supply, agriculture, and industrial uses. The government's short-term measures, such as increasing groundwater extraction (by 383 % from 1997 to 2022), are exacerbating the situation, leading to lon...

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Authors: Jódar, Jorge, Urrutia Meza, Javier, Herrera Lameli, Christian, Custodio Gimena, Emilio, Martos Rosillo, Sergio, Lambán Jiménez, Luis Javier
Format: article
Status:Published version
Publication Date:2024
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/370969
Online Access:http://hdl.handle.net/10261/370969
https://api.elsevier.com/content/abstract/scopus_id/85182256784
Access Level:Open access
Keyword:Sustainability
Anthropogenic drought
Groundwater depletion
Groundwater governance
Groundwater management
Chile
http://metadata.un.org/sdg/6
Ensure availability and sustainable management of water and sanitation for all
Ensure sustainable consumption and production patterns
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spelling The catastrophic effects of groundwater intensive exploitation and Megadrought on aquifers in Central Chile: Global change impact projections in water resources based on groundwater balance modelingJódar, JorgeUrrutia Meza, JavierHerrera Lameli, ChristianCustodio Gimena, EmilioMartos Rosillo, SergioLambán Jiménez, Luis JavierSustainabilityAnthropogenic droughtGroundwater depletionGroundwater governanceGroundwater managementChilehttp://metadata.un.org/sdg/6Ensure availability and sustainable management of water and sanitation for allEnsure sustainable consumption and production patterns[EN] Central Chile is undergoing its most severe drought since 2010, affecting ecosystems, water supply, agriculture, and industrial uses. The government's short-term measures, such as increasing groundwater extraction (by 383 % from 1997 to 2022), are exacerbating the situation, leading to long-term hydrological deterioration. The objective of this research is to establish the main processes driving the water table depth evolution within Central Chile over the period 1979-2023. This is done by conducting groundwater balances on five major hydrological basins of Central Chile. For the Megadrought (MD) period (2010-2022), the groundwater level depths reflect not only the recharge variability but, especially, the forcing trend of groundwater withdrawals: they represent 35 % and 65 %, respectively, of the total phreatic level drawdown. This result underlines the dominant role played by groundwater withdrawals in the current delicate state of Central Chile's groundwater resources, while revealing that drought is a new complex phenomenon to deal with, in the midterm, to revert the current water resource trend in Central Chile. Our study moreover presents the impact of climate change in the basin in the framework of six different groundwater withdrawal scenarios. In the worst case (i.e., RCP8.5), the aquifer recharge decreases 18 % with respect to 1979-1997, which is the period assumed to be unaffected by the impact of MD and withdrawals. Such a reduction may be irrelevant in the dynamics of the aquifer system if the current extraction rate does not change. The estimated recovery time needed to reach aquifer conditions equal to those of the unaffected period is approximately 50 years.This research was supported by the “Severo Ochoa” extraordinary grants for excellence IGME-CSIC (AECEX2021). It was further supported by the Strategic Drought Research Fund of the ANID of Chile (Project FSEQ210020).Peer reviewedElsevierCSIC - Instituto Geológico y Minero de España (IGME)Agencia Nacional de Investigación y Desarrollo (Chile)Jódar, Jorge [0000-0001-8708-0303]Martos Rosillo, Sergio [0000-0001-8493-7789]Lambán Jiménez, Luis Javier [0000-0003-1473-3806]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202420242024info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/370969https://api.elsevier.com/content/abstract/scopus_id/85182256784reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésPublisher´s versionhttps://doi.org/10.1016/j.scitotenv.2023.169651Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3709692026-05-22T06:33:51Z
dc.title.none.fl_str_mv The catastrophic effects of groundwater intensive exploitation and Megadrought on aquifers in Central Chile: Global change impact projections in water resources based on groundwater balance modeling
title The catastrophic effects of groundwater intensive exploitation and Megadrought on aquifers in Central Chile: Global change impact projections in water resources based on groundwater balance modeling
spellingShingle The catastrophic effects of groundwater intensive exploitation and Megadrought on aquifers in Central Chile: Global change impact projections in water resources based on groundwater balance modeling
Jódar, Jorge
Sustainability
Anthropogenic drought
Groundwater depletion
Groundwater governance
Groundwater management
Chile
http://metadata.un.org/sdg/6
Ensure availability and sustainable management of water and sanitation for all
Ensure sustainable consumption and production patterns
title_short The catastrophic effects of groundwater intensive exploitation and Megadrought on aquifers in Central Chile: Global change impact projections in water resources based on groundwater balance modeling
title_full The catastrophic effects of groundwater intensive exploitation and Megadrought on aquifers in Central Chile: Global change impact projections in water resources based on groundwater balance modeling
title_fullStr The catastrophic effects of groundwater intensive exploitation and Megadrought on aquifers in Central Chile: Global change impact projections in water resources based on groundwater balance modeling
title_full_unstemmed The catastrophic effects of groundwater intensive exploitation and Megadrought on aquifers in Central Chile: Global change impact projections in water resources based on groundwater balance modeling
title_sort The catastrophic effects of groundwater intensive exploitation and Megadrought on aquifers in Central Chile: Global change impact projections in water resources based on groundwater balance modeling
dc.creator.none.fl_str_mv Jódar, Jorge
Urrutia Meza, Javier
Herrera Lameli, Christian
Custodio Gimena, Emilio
Martos Rosillo, Sergio
Lambán Jiménez, Luis Javier
author Jódar, Jorge
author_facet Jódar, Jorge
Urrutia Meza, Javier
Herrera Lameli, Christian
Custodio Gimena, Emilio
Martos Rosillo, Sergio
Lambán Jiménez, Luis Javier
author_role author
author2 Urrutia Meza, Javier
Herrera Lameli, Christian
Custodio Gimena, Emilio
Martos Rosillo, Sergio
Lambán Jiménez, Luis Javier
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv CSIC - Instituto Geológico y Minero de España (IGME)
Agencia Nacional de Investigación y Desarrollo (Chile)
Jódar, Jorge [0000-0001-8708-0303]
Martos Rosillo, Sergio [0000-0001-8493-7789]
Lambán Jiménez, Luis Javier [0000-0003-1473-3806]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Sustainability
Anthropogenic drought
Groundwater depletion
Groundwater governance
Groundwater management
Chile
http://metadata.un.org/sdg/6
Ensure availability and sustainable management of water and sanitation for all
Ensure sustainable consumption and production patterns
topic Sustainability
Anthropogenic drought
Groundwater depletion
Groundwater governance
Groundwater management
Chile
http://metadata.un.org/sdg/6
Ensure availability and sustainable management of water and sanitation for all
Ensure sustainable consumption and production patterns
description [EN] Central Chile is undergoing its most severe drought since 2010, affecting ecosystems, water supply, agriculture, and industrial uses. The government's short-term measures, such as increasing groundwater extraction (by 383 % from 1997 to 2022), are exacerbating the situation, leading to long-term hydrological deterioration. The objective of this research is to establish the main processes driving the water table depth evolution within Central Chile over the period 1979-2023. This is done by conducting groundwater balances on five major hydrological basins of Central Chile. For the Megadrought (MD) period (2010-2022), the groundwater level depths reflect not only the recharge variability but, especially, the forcing trend of groundwater withdrawals: they represent 35 % and 65 %, respectively, of the total phreatic level drawdown. This result underlines the dominant role played by groundwater withdrawals in the current delicate state of Central Chile's groundwater resources, while revealing that drought is a new complex phenomenon to deal with, in the midterm, to revert the current water resource trend in Central Chile. Our study moreover presents the impact of climate change in the basin in the framework of six different groundwater withdrawal scenarios. In the worst case (i.e., RCP8.5), the aquifer recharge decreases 18 % with respect to 1979-1997, which is the period assumed to be unaffected by the impact of MD and withdrawals. Such a reduction may be irrelevant in the dynamics of the aquifer system if the current extraction rate does not change. The estimated recovery time needed to reach aquifer conditions equal to those of the unaffected period is approximately 50 years.
publishDate 2024
dc.date.none.fl_str_mv 2024
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/370969
https://api.elsevier.com/content/abstract/scopus_id/85182256784
url http://hdl.handle.net/10261/370969
https://api.elsevier.com/content/abstract/scopus_id/85182256784
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Publisher´s version
https://doi.org/10.1016/j.scitotenv.2023.169651
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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