Subsurface Mixing Dynamics Across the Salt-Freshwater Interface

Mixing along the salt-freshwater interface is critical for geochemical reactions, transport, and transformation of nutrients and contaminants in coastal ecosystems. However, the mechanisms and controls of mixing are not well understood. We develop an analytical model, based on the coupling between f...

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Detalles Bibliográficos
Autores: De Vriendt, Kevin, Le Borgne, T., Pool, María, Dentz, Marco
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/270426
Acceso en línea:http://hdl.handle.net/10261/270426
https://api.elsevier.com/content/abstract/scopus_id/85128717231
Access Level:acceso abierto
Palabra clave:Mixing
Analytical models
Coastal groundwater
Flow deformation
Numerical modeling
Seawater intrusion
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spelling Subsurface Mixing Dynamics Across the Salt-Freshwater InterfaceDe Vriendt, KevinLe Borgne, T.Pool, MaríaDentz, MarcoMixingAnalytical modelsCoastal groundwaterFlow deformationNumerical modelingSeawater intrusionMixing along the salt-freshwater interface is critical for geochemical reactions, transport, and transformation of nutrients and contaminants in coastal ecosystems. However, the mechanisms and controls of mixing are not well understood. We develop an analytical model, based on the coupling between flow deformation and dispersion, which predicts the mixing dynamics along the interface for steady-state flow in coastal aquifers. The analytical predictions are compared with the results of detailed numerical simulations, which show that nonuniform flow fields, inherent to seawater intrusion in coastal aquifer, result in a non-monotonic evolution of mixing width and mixing rates along the interface. The analytical model accurately captures these dynamics over a range of freshwater flow rates and dispersivities. It predicts the evolution of the mixing width and mixing rates along the interface, offering a new framework for understanding and modeling mixing and reaction processes in coastal aquifers.This project has received funding from the European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie Grant Agreement No. 722028 (ENIGMA ITN). Maria Pool acknowledges the support of MCIN/AEI/10.13039/501100011033 through the Torres-Quevedo program (PTQ2018-010081). MD acknowledges the support of MCIN/AEI/10.13039/501100011033 through the project HydroPore (PID2019-106887GB-C31) and the Grant CEX2018-000794-S.Peer reviewedEuropean Geosciences UnionEuropean CommissionMinisterio de Ciencia e Innovación (España)0000-0002-1701-66290000-0001-9266-91390000-0003-1811-42010000-0002-3940-282XConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202220222022info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/270426https://api.elsevier.com/content/abstract/scopus_id/85128717231reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/H2020/722028info:eu-repo/grantAgreement/MCIN/AEI/10.13039Geophysical Research Lettershttps://doi.org/10.1029/2021GL097094Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2704262026-05-22T06:33:51Z
dc.title.none.fl_str_mv Subsurface Mixing Dynamics Across the Salt-Freshwater Interface
title Subsurface Mixing Dynamics Across the Salt-Freshwater Interface
spellingShingle Subsurface Mixing Dynamics Across the Salt-Freshwater Interface
De Vriendt, Kevin
Mixing
Analytical models
Coastal groundwater
Flow deformation
Numerical modeling
Seawater intrusion
title_short Subsurface Mixing Dynamics Across the Salt-Freshwater Interface
title_full Subsurface Mixing Dynamics Across the Salt-Freshwater Interface
title_fullStr Subsurface Mixing Dynamics Across the Salt-Freshwater Interface
title_full_unstemmed Subsurface Mixing Dynamics Across the Salt-Freshwater Interface
title_sort Subsurface Mixing Dynamics Across the Salt-Freshwater Interface
dc.creator.none.fl_str_mv De Vriendt, Kevin
Le Borgne, T.
Pool, María
Dentz, Marco
author De Vriendt, Kevin
author_facet De Vriendt, Kevin
Le Borgne, T.
Pool, María
Dentz, Marco
author_role author
author2 Le Borgne, T.
Pool, María
Dentz, Marco
author2_role author
author
author
dc.contributor.none.fl_str_mv European Commission
Ministerio de Ciencia e Innovación (España)
0000-0002-1701-6629
0000-0001-9266-9139
0000-0003-1811-4201
0000-0002-3940-282X
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Mixing
Analytical models
Coastal groundwater
Flow deformation
Numerical modeling
Seawater intrusion
topic Mixing
Analytical models
Coastal groundwater
Flow deformation
Numerical modeling
Seawater intrusion
description Mixing along the salt-freshwater interface is critical for geochemical reactions, transport, and transformation of nutrients and contaminants in coastal ecosystems. However, the mechanisms and controls of mixing are not well understood. We develop an analytical model, based on the coupling between flow deformation and dispersion, which predicts the mixing dynamics along the interface for steady-state flow in coastal aquifers. The analytical predictions are compared with the results of detailed numerical simulations, which show that nonuniform flow fields, inherent to seawater intrusion in coastal aquifer, result in a non-monotonic evolution of mixing width and mixing rates along the interface. The analytical model accurately captures these dynamics over a range of freshwater flow rates and dispersivities. It predicts the evolution of the mixing width and mixing rates along the interface, offering a new framework for understanding and modeling mixing and reaction processes in coastal aquifers.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022
2022
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/10261/270426
https://api.elsevier.com/content/abstract/scopus_id/85128717231
url http://hdl.handle.net/10261/270426
https://api.elsevier.com/content/abstract/scopus_id/85128717231
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/EC/H2020/722028
info:eu-repo/grantAgreement/MCIN/AEI/10.13039
Geophysical Research Letters
https://doi.org/10.1029/2021GL097094
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv European Geosciences Union
publisher.none.fl_str_mv European Geosciences Union
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
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