Regional groundwater modeling of the guarani aquifer system
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.3390/W12092323 http://hdl.handle.net/11449/199338 |
Resumo: | The Guarani Aquifer System (GAS) is a strategic transboundary aquifer system shared by Brazil, Argentina, Paraguay and Uruguay. This article presents a groundwater flow model to assess the GAS system in terms of regional flow patterns, water balance and overall recharge. Despite the continental dimension of GAS, groundwater recharge is restricted to narrow outcrop zones. An important part is discharged into local watersheds, whereas a minor amount reaches the confined part. A three-dimensional finite element groundwater-flow model of the entire GAS system was constructed to obtain a better understanding of the prevailing flow dynamics and more reliable estimates of groundwater recharge. Our results show that recharge rates effectively contributing to the regional GAS water balance are only approximately 0.6 km3/year (about 4.9 mm/year). These rates are much smaller than previous estimates, including of deep recharge approximations commonly used for water resources management. Higher recharge rates were also not compatible with known 81Kr groundwater age estimates, as well as with calculated residence times using a particle tracking algorithm. |
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Regional groundwater modeling of the guarani aquifer systemFinite element method (FEM)Groundwater ageGroundwater modelingGroundwater rechargeGuarani Aquifer System (GAS)Numerical modelingWater resources managementThe Guarani Aquifer System (GAS) is a strategic transboundary aquifer system shared by Brazil, Argentina, Paraguay and Uruguay. This article presents a groundwater flow model to assess the GAS system in terms of regional flow patterns, water balance and overall recharge. Despite the continental dimension of GAS, groundwater recharge is restricted to narrow outcrop zones. An important part is discharged into local watersheds, whereas a minor amount reaches the confined part. A three-dimensional finite element groundwater-flow model of the entire GAS system was constructed to obtain a better understanding of the prevailing flow dynamics and more reliable estimates of groundwater recharge. Our results show that recharge rates effectively contributing to the regional GAS water balance are only approximately 0.6 km3/year (about 4.9 mm/year). These rates are much smaller than previous estimates, including of deep recharge approximations commonly used for water resources management. Higher recharge rates were also not compatible with known 81Kr groundwater age estimates, as well as with calculated residence times using a particle tracking algorithm.Center for Environmental Studies and Basin Studies Laboratory São Paulo State University UNESPDepartment of Applied Geology and Basin Studies Laboratory São Paulo State University UNESPCenter for Environmental Studies and Basin Studies Laboratory São Paulo State University UNESPDepartment of Applied Geology and Basin Studies Laboratory São Paulo State University UNESPUniversidade Estadual Paulista (Unesp)Gonçalves, Roger D. [UNESP]Teramoto, Elias H. [UNESP]Chang, Hung K. [UNESP]2020-12-12T01:37:03Z2020-12-12T01:37:03Z2020-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.3390/W12092323Water (Switzerland), v. 12, n. 9, 2020.2073-4441http://hdl.handle.net/11449/19933810.3390/W120923232-s2.0-850902651161989662459244838Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengWater (Switzerland)info:eu-repo/semantics/openAccess2021-10-23T07:14:44Zoai:repositorio.unesp.br:11449/199338Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:10:42.602677Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Regional groundwater modeling of the guarani aquifer system |
title |
Regional groundwater modeling of the guarani aquifer system |
spellingShingle |
Regional groundwater modeling of the guarani aquifer system Gonçalves, Roger D. [UNESP] Finite element method (FEM) Groundwater age Groundwater modeling Groundwater recharge Guarani Aquifer System (GAS) Numerical modeling Water resources management |
title_short |
Regional groundwater modeling of the guarani aquifer system |
title_full |
Regional groundwater modeling of the guarani aquifer system |
title_fullStr |
Regional groundwater modeling of the guarani aquifer system |
title_full_unstemmed |
Regional groundwater modeling of the guarani aquifer system |
title_sort |
Regional groundwater modeling of the guarani aquifer system |
author |
Gonçalves, Roger D. [UNESP] |
author_facet |
Gonçalves, Roger D. [UNESP] Teramoto, Elias H. [UNESP] Chang, Hung K. [UNESP] |
author_role |
author |
author2 |
Teramoto, Elias H. [UNESP] Chang, Hung K. [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Gonçalves, Roger D. [UNESP] Teramoto, Elias H. [UNESP] Chang, Hung K. [UNESP] |
dc.subject.por.fl_str_mv |
Finite element method (FEM) Groundwater age Groundwater modeling Groundwater recharge Guarani Aquifer System (GAS) Numerical modeling Water resources management |
topic |
Finite element method (FEM) Groundwater age Groundwater modeling Groundwater recharge Guarani Aquifer System (GAS) Numerical modeling Water resources management |
description |
The Guarani Aquifer System (GAS) is a strategic transboundary aquifer system shared by Brazil, Argentina, Paraguay and Uruguay. This article presents a groundwater flow model to assess the GAS system in terms of regional flow patterns, water balance and overall recharge. Despite the continental dimension of GAS, groundwater recharge is restricted to narrow outcrop zones. An important part is discharged into local watersheds, whereas a minor amount reaches the confined part. A three-dimensional finite element groundwater-flow model of the entire GAS system was constructed to obtain a better understanding of the prevailing flow dynamics and more reliable estimates of groundwater recharge. Our results show that recharge rates effectively contributing to the regional GAS water balance are only approximately 0.6 km3/year (about 4.9 mm/year). These rates are much smaller than previous estimates, including of deep recharge approximations commonly used for water resources management. Higher recharge rates were also not compatible with known 81Kr groundwater age estimates, as well as with calculated residence times using a particle tracking algorithm. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-12T01:37:03Z 2020-12-12T01:37:03Z 2020-09-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.3390/W12092323 Water (Switzerland), v. 12, n. 9, 2020. 2073-4441 http://hdl.handle.net/11449/199338 10.3390/W12092323 2-s2.0-85090265116 1989662459244838 |
url |
http://dx.doi.org/10.3390/W12092323 http://hdl.handle.net/11449/199338 |
identifier_str_mv |
Water (Switzerland), v. 12, n. 9, 2020. 2073-4441 10.3390/W12092323 2-s2.0-85090265116 1989662459244838 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Water (Switzerland) |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129294150402048 |