Groundwater salinization in arid coastal wetlands: a study case from Playa Fracasso, Patagonia, Argentina

Autores
Álvarez, María del Pilar; Dapeña, Cristina; Bouza, Pablo J.; Ríos, Ileana; Hernández, Mario Alberto
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The origin of the high salinity in the groundwater of a coastal wetland in an arid climate was studied in the Playa Fracasso marsh, located on the northwest coast of the extra-Andean Patagonia. Research was carried out by means of the design of a network of soil pits and short piezometers in the marsh and the surrounding landforms. Continuous fluctuations of the water table, in situ physical and chemical properties, major ions (Ca²⁺, Mg²⁺, Na⁺, K⁺, Cl⁻, SO₄²⁻, HCO₃⁻) and stable isotopes (¹⁸O and ²H) in groundwater, as well as soil salinity, were measured. The combined analysis of the hydrodynamics, the ion ratios rCa²⁺/rCl⁻ and rMg²⁺/rCa²⁺ vs. rCl⁻ and the isotopic composition made it possible to recognize an area within the high marsh in which the origin of groundwater is mainly marine and another in which the contributions are of mixed origin. By means of the analysis of rCl⁻ vs. δ¹⁸O, a salinization process with no change in isotopic composition was identified. Its interpretation, together with those of the soil salinity profiles and the records of the fluctuations in electrical conductivity associated with extraordinary tides, was used to define a conceptual model of salinization which could be useful to understand other coastal wetlands under similar arid climatic conditions. It consists in a cyclical mechanism of evapotranspiration, precipitation, dissolution and transport of salts during tides.
Facultad de Ciencias Naturales y Museo
Materia
Ciencias Naturales
Geohydrology
Hydrochemistry
Salt marsh
Patagonia
Arid climate
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/134737
Acceder
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spelling Groundwater salinization in arid coastal wetlands: a study case from Playa Fracasso, Patagonia, ArgentinaÁlvarez, María del PilarDapeña, CristinaBouza, Pablo J.Ríos, IleanaHernández, Mario AlbertoCiencias NaturalesGeohydrologyHydrochemistrySalt marshPatagoniaArid climateThe origin of the high salinity in the groundwater of a coastal wetland in an arid climate was studied in the Playa Fracasso marsh, located on the northwest coast of the extra-Andean Patagonia. Research was carried out by means of the design of a network of soil pits and short piezometers in the marsh and the surrounding landforms. Continuous fluctuations of the water table, in situ physical and chemical properties, major ions (Ca²⁺, Mg²⁺, Na⁺, K⁺, Cl⁻, SO₄²⁻, HCO₃⁻) and stable isotopes (¹⁸O and ²H) in groundwater, as well as soil salinity, were measured. The combined analysis of the hydrodynamics, the ion ratios rCa²⁺/rCl⁻ and rMg²⁺/rCa²⁺ vs. rCl⁻ and the isotopic composition made it possible to recognize an area within the high marsh in which the origin of groundwater is mainly marine and another in which the contributions are of mixed origin. By means of the analysis of rCl⁻ vs. δ¹⁸O, a salinization process with no change in isotopic composition was identified. Its interpretation, together with those of the soil salinity profiles and the records of the fluctuations in electrical conductivity associated with extraordinary tides, was used to define a conceptual model of salinization which could be useful to understand other coastal wetlands under similar arid climatic conditions. It consists in a cyclical mechanism of evapotranspiration, precipitation, dissolution and transport of salts during tides.Facultad de Ciencias Naturales y Museo2015-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf7983-7994http://sedici.unlp.edu.ar/handle/10915/134737enginfo:eu-repo/semantics/altIdentifier/issn/1866-6280info:eu-repo/semantics/altIdentifier/issn/1866-6299info:eu-repo/semantics/altIdentifier/doi/10.1007/s12665-014-3957-3info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-15T11:23:47Zoai:sedici.unlp.edu.ar:10915/134737Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-15 11:23:48.087SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Groundwater salinization in arid coastal wetlands: a study case from Playa Fracasso, Patagonia, Argentina
title Groundwater salinization in arid coastal wetlands: a study case from Playa Fracasso, Patagonia, Argentina
spellingShingle Groundwater salinization in arid coastal wetlands: a study case from Playa Fracasso, Patagonia, Argentina
Álvarez, María del Pilar
Ciencias Naturales
Geohydrology
Hydrochemistry
Salt marsh
Patagonia
Arid climate
title_short Groundwater salinization in arid coastal wetlands: a study case from Playa Fracasso, Patagonia, Argentina
title_full Groundwater salinization in arid coastal wetlands: a study case from Playa Fracasso, Patagonia, Argentina
title_fullStr Groundwater salinization in arid coastal wetlands: a study case from Playa Fracasso, Patagonia, Argentina
title_full_unstemmed Groundwater salinization in arid coastal wetlands: a study case from Playa Fracasso, Patagonia, Argentina
title_sort Groundwater salinization in arid coastal wetlands: a study case from Playa Fracasso, Patagonia, Argentina
dc.creator.none.fl_str_mv Álvarez, María del Pilar
Dapeña, Cristina
Bouza, Pablo J.
Ríos, Ileana
Hernández, Mario Alberto
author Álvarez, María del Pilar
author_facet Álvarez, María del Pilar
Dapeña, Cristina
Bouza, Pablo J.
Ríos, Ileana
Hernández, Mario Alberto
author_role author
author2 Dapeña, Cristina
Bouza, Pablo J.
Ríos, Ileana
Hernández, Mario Alberto
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ciencias Naturales
Geohydrology
Hydrochemistry
Salt marsh
Patagonia
Arid climate
topic Ciencias Naturales
Geohydrology
Hydrochemistry
Salt marsh
Patagonia
Arid climate
dc.description.none.fl_txt_mv The origin of the high salinity in the groundwater of a coastal wetland in an arid climate was studied in the Playa Fracasso marsh, located on the northwest coast of the extra-Andean Patagonia. Research was carried out by means of the design of a network of soil pits and short piezometers in the marsh and the surrounding landforms. Continuous fluctuations of the water table, in situ physical and chemical properties, major ions (Ca²⁺, Mg²⁺, Na⁺, K⁺, Cl⁻, SO₄²⁻, HCO₃⁻) and stable isotopes (¹⁸O and ²H) in groundwater, as well as soil salinity, were measured. The combined analysis of the hydrodynamics, the ion ratios rCa²⁺/rCl⁻ and rMg²⁺/rCa²⁺ vs. rCl⁻ and the isotopic composition made it possible to recognize an area within the high marsh in which the origin of groundwater is mainly marine and another in which the contributions are of mixed origin. By means of the analysis of rCl⁻ vs. δ¹⁸O, a salinization process with no change in isotopic composition was identified. Its interpretation, together with those of the soil salinity profiles and the records of the fluctuations in electrical conductivity associated with extraordinary tides, was used to define a conceptual model of salinization which could be useful to understand other coastal wetlands under similar arid climatic conditions. It consists in a cyclical mechanism of evapotranspiration, precipitation, dissolution and transport of salts during tides.
Facultad de Ciencias Naturales y Museo
description The origin of the high salinity in the groundwater of a coastal wetland in an arid climate was studied in the Playa Fracasso marsh, located on the northwest coast of the extra-Andean Patagonia. Research was carried out by means of the design of a network of soil pits and short piezometers in the marsh and the surrounding landforms. Continuous fluctuations of the water table, in situ physical and chemical properties, major ions (Ca²⁺, Mg²⁺, Na⁺, K⁺, Cl⁻, SO₄²⁻, HCO₃⁻) and stable isotopes (¹⁸O and ²H) in groundwater, as well as soil salinity, were measured. The combined analysis of the hydrodynamics, the ion ratios rCa²⁺/rCl⁻ and rMg²⁺/rCa²⁺ vs. rCl⁻ and the isotopic composition made it possible to recognize an area within the high marsh in which the origin of groundwater is mainly marine and another in which the contributions are of mixed origin. By means of the analysis of rCl⁻ vs. δ¹⁸O, a salinization process with no change in isotopic composition was identified. Its interpretation, together with those of the soil salinity profiles and the records of the fluctuations in electrical conductivity associated with extraordinary tides, was used to define a conceptual model of salinization which could be useful to understand other coastal wetlands under similar arid climatic conditions. It consists in a cyclical mechanism of evapotranspiration, precipitation, dissolution and transport of salts during tides.
publishDate 2015
dc.date.none.fl_str_mv 2015-06
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/134737
url http://sedici.unlp.edu.ar/handle/10915/134737
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1866-6280
info:eu-repo/semantics/altIdentifier/issn/1866-6299
info:eu-repo/semantics/altIdentifier/doi/10.1007/s12665-014-3957-3
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
dc.format.none.fl_str_mv application/pdf
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instname:Universidad Nacional de La Plata
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reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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