Key hydrological processes in the Del Azul Creek basin, sub-humid Pampean Plain.

Zabala, M. Emilia; Gorocito, Martín; Dietrich, Sebastián; Varni, Marcelo; Sánchez Murillo, Ricardo; Manzano Arellano, María del Sol; Ceballos, Elina

Key hydrological processes in the Del Azul Creek basin, sub-humid Pampean Plain.

Groundwater plays an important role in the economic development of the Chaco-Pampean Plain (Argentina), where industry, agriculture and cattle farming are the main economic activities. The 66% of the country's popu-lation lives in this area. The low slopes of this region condition the water mov...

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Autores:	Zabala, M. Emilia, Gorocito, Martín, Dietrich, Sebastián, Varni, Marcelo, Sánchez Murillo, Ricardo, Manzano Arellano, María del Sol, Ceballos, Elina
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:10317/13357
Acceso en línea:	http://hdl.handle.net/10317/13357 https://www.sciencedirect.com/science/article/pii/S0048969720357879?via%3Dihub
Access Level:	acceso abierto
Palabra clave:	Hydrological-physical processes Stable isotopes Rainwater Surface water Groundwater Pampeano aquifer Explotación de Minas 2506.05 Hidrogeología 2503 Geoquímica 2508.10 Precipitación

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spelling	Key hydrological processes in the Del Azul Creek basin, sub-humid Pampean Plain.Zabala, M. EmiliaGorocito, MartínDietrich, SebastiánVarni, MarceloSánchez Murillo, RicardoManzano Arellano, María del SolCeballos, ElinaHydrological-physical processesStable isotopesRainwaterSurface waterGroundwaterPampeano aquiferExplotación de Minas2506.05 Hidrogeología2503 Geoquímica2508.10 PrecipitaciónGroundwater plays an important role in the economic development of the Chaco-Pampean Plain (Argentina), where industry, agriculture and cattle farming are the main economic activities. The 66% of the country's popu-lation lives in this area. The low slopes of this region condition the water movement and the occurrence of phys-ical and chemical processes. The aim of this work is to update the hydrological conceptual model of the Del Azul Creek basin (Buenos Aires Province), a sub-humid and continental plain, using environmental tracers. In total, the study was based on the analysis of 201 samples (stable isotopes) and 184 samples (chemical data) including rain-water, surface water and groundwater. The temporal and spatial variation in the isotopic composition of rainfall and the hydrological physical-processes, evaporation, surface water-groundwater interaction and recharge were studied. Isotopic compositions of rainfall revealed a seasonal variation across the basin. Low δ18O rainfalls occur during the coldest seasons, while high δ18O rainfalls occur during the warmest seasons. The isotopic composi-tions of rainfall varied only during the cold period in the upper basin. At this time, the lowest δ18O rainfall fell in the upper basin, while in the other areas and during the warmer seasons, no differences were observed. Evap-oration was a relevant process in the ﬂatter area of the basin, mainly during the warmest seasons. Samples taken from the wetlands and from the lower section of the Del Azul Creek were strongly evaporated. In the ﬁrst 30 m depth of the aquifer, groundwater reﬂected the isotopic composition of rainfall from the warmest seasons, thus revealing seasonal preferential recharge and a good hydraulic connection. This study provides direct evidence showing that both evaporation and the surface water-groundwater interaction are processes that play a key role in the control of the isotopic and chemical composition of water.This research was supported by the Instituto de Hidrología de Llanuras ‘‘Dr. Eduardo J. Usunoff” (IHLLA, Argentina) and the project PICT 2016 Nº 3688. The first, third and seventh authors are funded by the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET, Argentina), while the second author is funded by the Agencia Nacional de Promoción Científica y Tecnológica (ANPCyT, Argentina). We thank the IHLLA technical staff Enrique Queupán, Joaquín Rodríguez María Fátima Altolaguirre, Ornella Floriani and Georgina Cazenave, for their assistance in carrying out the water sampling, the chemical analyses and the superficial flow rate measurements. Special thanks to Mariana Oyarzabal for English assistance. The authors welcome comments from anonymous reviewers, whose observations have been very helpful improving the manuscript.ElsevierInstituto de Hidrología de Llanuras, ArgentinaInstituto de Hidrología de Llanuras (IHLLA-Argentina)Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET- Argentina)Agencia Nacional de Promoción Científica y Tecnológica (ANPCyT- Argentina)202420242021info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfapplication/pdfhttp://hdl.handle.net/10317/13357https://www.sciencedirect.com/science/article/pii/S0048969720357879?via%3Dihubreponame:Repositorio Digital UPCTinstname:Universidad Politécnica de Cartagena(UPCT)Inglés3688info:eu-repo/semantics/openAccessoai:repositorio.upct.es:10317/133572026-05-15T06:39:02Z
dc.title.none.fl_str_mv	Key hydrological processes in the Del Azul Creek basin, sub-humid Pampean Plain.
title	Key hydrological processes in the Del Azul Creek basin, sub-humid Pampean Plain.
spellingShingle	Key hydrological processes in the Del Azul Creek basin, sub-humid Pampean Plain. Zabala, M. Emilia Hydrological-physical processes Stable isotopes Rainwater Surface water Groundwater Pampeano aquifer Explotación de Minas 2506.05 Hidrogeología 2503 Geoquímica 2508.10 Precipitación
title_short	Key hydrological processes in the Del Azul Creek basin, sub-humid Pampean Plain.
title_full	Key hydrological processes in the Del Azul Creek basin, sub-humid Pampean Plain.
title_fullStr	Key hydrological processes in the Del Azul Creek basin, sub-humid Pampean Plain.
title_full_unstemmed	Key hydrological processes in the Del Azul Creek basin, sub-humid Pampean Plain.
title_sort	Key hydrological processes in the Del Azul Creek basin, sub-humid Pampean Plain.
dc.creator.none.fl_str_mv	Zabala, M. Emilia Gorocito, Martín Dietrich, Sebastián Varni, Marcelo Sánchez Murillo, Ricardo Manzano Arellano, María del Sol Ceballos, Elina
author	Zabala, M. Emilia
author_facet	Zabala, M. Emilia Gorocito, Martín Dietrich, Sebastián Varni, Marcelo Sánchez Murillo, Ricardo Manzano Arellano, María del Sol Ceballos, Elina
author_role	author
author2	Gorocito, Martín Dietrich, Sebastián Varni, Marcelo Sánchez Murillo, Ricardo Manzano Arellano, María del Sol Ceballos, Elina
author2_role	author author author author author author
dc.contributor.none.fl_str_mv	Instituto de Hidrología de Llanuras, Argentina Instituto de Hidrología de Llanuras (IHLLA-Argentina) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET- Argentina) Agencia Nacional de Promoción Científica y Tecnológica (ANPCyT- Argentina)
dc.subject.none.fl_str_mv	Hydrological-physical processes Stable isotopes Rainwater Surface water Groundwater Pampeano aquifer Explotación de Minas 2506.05 Hidrogeología 2503 Geoquímica 2508.10 Precipitación
topic	Hydrological-physical processes Stable isotopes Rainwater Surface water Groundwater Pampeano aquifer Explotación de Minas 2506.05 Hidrogeología 2503 Geoquímica 2508.10 Precipitación
description	Groundwater plays an important role in the economic development of the Chaco-Pampean Plain (Argentina), where industry, agriculture and cattle farming are the main economic activities. The 66% of the country's popu-lation lives in this area. The low slopes of this region condition the water movement and the occurrence of phys-ical and chemical processes. The aim of this work is to update the hydrological conceptual model of the Del Azul Creek basin (Buenos Aires Province), a sub-humid and continental plain, using environmental tracers. In total, the study was based on the analysis of 201 samples (stable isotopes) and 184 samples (chemical data) including rain-water, surface water and groundwater. The temporal and spatial variation in the isotopic composition of rainfall and the hydrological physical-processes, evaporation, surface water-groundwater interaction and recharge were studied. Isotopic compositions of rainfall revealed a seasonal variation across the basin. Low δ18O rainfalls occur during the coldest seasons, while high δ18O rainfalls occur during the warmest seasons. The isotopic composi-tions of rainfall varied only during the cold period in the upper basin. At this time, the lowest δ18O rainfall fell in the upper basin, while in the other areas and during the warmer seasons, no differences were observed. Evap-oration was a relevant process in the ﬂatter area of the basin, mainly during the warmest seasons. Samples taken from the wetlands and from the lower section of the Del Azul Creek were strongly evaporated. In the ﬁrst 30 m depth of the aquifer, groundwater reﬂected the isotopic composition of rainfall from the warmest seasons, thus revealing seasonal preferential recharge and a good hydraulic connection. This study provides direct evidence showing that both evaporation and the surface water-groundwater interaction are processes that play a key role in the control of the isotopic and chemical composition of water.
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/10317/13357 https://www.sciencedirect.com/science/article/pii/S0048969720357879?via%3Dihub
url	http://hdl.handle.net/10317/13357 https://www.sciencedirect.com/science/article/pii/S0048969720357879?via%3Dihub
dc.language.none.fl_str_mv	Inglés
language_invalid_str_mv	Inglés
dc.relation.none.fl_str_mv	3688
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
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repository.mail.fl_str_mv
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Key hydrological processes in the Del Azul Creek basin, sub-humid Pampean Plain.

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