Use of isotopes techniques to reveal the origin of water salinity in an arid region of Central-Western Argentina

Gomez, L. V.; Álvarez, Amílcar; D'Ambrosio, D. Sabina; Zalazar, Gualberto; Aravena, Ramón

doi:10.1016/j.scitotenv.2020.142935

Cited by 14 publications

(6 citation statements)

References 29 publications

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“…El sitio se localiza en la cuenca del río Tunuyán, que a unos 20 km presenta valores de -17,8‰ (Poca et al, 2020). Otro muestreo próximo al lugar de emplazamiento del sitio se encuentra en el embalse El Carrizal y alrededores, a unos 30 km lineales de AA, y los valores registrados (entre -18,2‰ y -14,3‰; Gomez et al, 2021), también podrían explicar la tendencia de los individuos analizados aquí. Asimismo, los valores del río Mendoza más cercanos al sitio (50 km lineales) tienen un promedio de -17,7‰ (Gomez et al, 2021).…”

Section: Discussionunclassified

“…Otro muestreo próximo al lugar de emplazamiento del sitio se encuentra en el embalse El Carrizal y alrededores, a unos 30 km lineales de AA, y los valores registrados (entre -18,2‰ y -14,3‰; Gomez et al, 2021), también podrían explicar la tendencia de los individuos analizados aquí. Asimismo, los valores del río Mendoza más cercanos al sitio (50 km lineales) tienen un promedio de -17,7‰ (Gomez et al, 2021). Por otra parte, los valores de las aguas del Valle de Uspallata presentan una variación comprendida entre -16 y -14‰ (Ibáñez et al, 2021), por fuera del rango de aguas bebidas de los individuos de AA.…”

Section: Discussionunclassified

“…Debido a que ambos presentan cronologías diferentes, es probable que este patrón de movilidad responda a una escala de uso del espacio más amplia de larga trayectoria previa a la dominación incaica. Por otra parte, se destaca que el individuo AF521/1, cuyo consumo de maíz sería relativamente menor, pudo ocupar tanto en su juventud como en su adultez la misma área, dada la proximidad de su valor con algunos de los registrados en las cercanías del sitio (Gomez et al, 2021). Aunque estas tendencias podrían ser un artefacto del muestreo de las fuentes de agua, no observamos aquí el ingreso de población desde el oeste o del norte asociada al consumo de plantas C 4 , en momentos previos o durante el período incaico, como sucede por ejemplo en el Valle de Uspallata (Barberena et al, 2020).…”

Section: Discussionunclassified

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Agricultura y movilidad en la frontera suroriental del imperio incaico: contribuciones bioarqueológicas del sitio Agua Amarga (Valle de Uco)

Peralta,

Ots

2024

RevArgAntropBiol

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El desarrollo de la agricultura hace ca. 2500 años promovió cambios demográficos, económicos, sociales y culturales en el centro de Mendoza. Con el propósito de contribuir al estudio de estos procesos, en este trabajo exploramos las tendencias en la dieta y la movilidad en el Valle de Uco a partir del estudio de la colección bioarqueológica del sitio Agua Amarga conservada en el Museo de Historia Natural de San Rafael (Mendoza). Para sortear las dificultades subyacentes a las condiciones del rescate y a la pobre preservación de las muestras, integramos múltiples líneas de evidencia que incluyen la reconstrucción cronológica, el contexto funerario, y el análisis bioarqueológico y de isótopos estables (δ13Ccol, δ15N, δ13Capa y δ18O). Estas líneas se suman a los estudios arqueológicos previos del sitio. Con respecto a las tendencias que señalan un alto consumo de maíz a partir de 1100 años AP que decae hacia 550 años AP en el norte y centro de Mendoza, la evidencia isotópica obtenida de Agua Amarga se destaca en el contexto regional por mantener un alto consumo antes y durante el período tardío-inca e inicio de la colonia. En cuanto a la movilidad, los valores de δ18O de los individuos se corresponden con un origen local o del Valle de Uco, lo cual se deberá ajustar con un muestreo más completo de aguas en la región.

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Section: Discussionunclassified

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Agricultura y movilidad en la frontera suroriental del imperio incaico: contribuciones bioarqueológicas del sitio Agua Amarga (Valle de Uco)

Peralta,

Ots

2024

RevArgAntropBiol

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“…Gomez et al (2014) detected high salt content and hardness in an aquifer located between Mendoza and San Juan basins, with a signature of human activities due to increased nitrate concentrations near livestock gathering areas. Irrigation return flows from the agricultural areas were linked to the increases in groundwater salinity levels (Gomez et al, 2021). Arsenic levels over this area were also well above the international quality standards, with negative effects on the health of rural communities (Gomez et al, 2019).…”

Section: Perspectives For Improved Hydrological Drought Monitoringmentioning

confidence: 98%

A Decade of Hydrological Drought in Central-Western Argentina

et al. 2021

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Most of the water used for the development of the main socio-economic activities in Central-Western Argentina (CWA), an arid to semi-arid region, home to most of the Argentinean wine production, relies on surface streamflow from several snow-fed rivers. During the last decade (2010-2020), reduced snow accumulation over the higher elevations of the Andes mountains triggered the occurrence of hydrological drought over CWA, affecting winter tourism, restricting water use for irrigation and domestic use, and leading to socio-political disputes. This study provides a detailed description of the recent hydrological drought conditions through the use of streamflow records from 15 river basins, which were complemented by precipitation, snowpack, and water equivalent thickness measurements to provide a comprehensive picture of the water losses over the last decade. Hydrological drought indices derived from the threshold level method and the standardized streamflow index allowed characterizing the unusualness of this dry period in the context of the last 49 years. The hydrological deficit over the last decade highlighted the challenges faced by the water managers to provide water for irrigation in the main agricultural oases, with a likely overexploitation of the groundwater resources to supplement the limited surface runoff. The hydrological drought severity increased since 2017, with record-breaking levels in several basins, particularly during the period between July 2019 and June 2020 for the rivers located between 35° and 36°S. We identified the main hydrological drought impacts in CWA, as well as the need for improved mitigation strategies to cope with current and future drought conditions. We also analyzed the current limitations in terms of snow and groundwater observations, highlighting the necessity for an effective hydrological drought monitoring system, together with an improved forecast of snow accumulation in the headwaters, which can contribute to better regional water management plans.

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“…Groundwater salinization is a major environmental problem affecting water resources while causing restriction of accessibility to suitable water especially in arid and semi-arid regions and coastal zones (Gomez et al, 2021;Vengosh, 2014). The processes responsible for the development of salinization of water are complex and intimately related to the transport of dissolved mass in groundwater ow systems.…”

Section: Introductionmentioning

confidence: 99%

Origins And Processes of Groundwater Salinization Beneath Playa Lake Aquifers In Iran: A Chemical And Stable Isotope Approach

Mirzavand

Ghazban

2021

Preprint

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Groundwater salinization and interaction between Playa Lake and regional groundwater was investigated using multi-chemo-isotopic evidences. Forty groundwater and 26 Kashan Playa Lake (KPL) water samples collected and analyzed for their geochemical compositions. The evolution of hydrochemical facies in Kashan Plain Aquifer (KPA) to KPL is Ca-HCO3 (19%), Mix Ca-Cl (9%), Ca-Cl (17%), and Mix Na-Cl and Na-Cl (55%). Also, the Hydrochemical Facies Evolution Diagram (HFE-D) proposed cation exchange as the main process of salinization in KPA. Based on the binary hydrogeochemical diagrams of (Na+/ Cl-)/Cl-, (Ca2++Mg2+)/HCO3-+SO42-, and Cl/Br, dissolution of halite and gypsum in the Miocene marlstone in the KPA is the main source of salinity. The isotopic composition δ18O in aquifer and playa water samples varies from -10.03 to 7.03‰ (VSMOW) with an average of -6.95 ‰ and -60.73 to 25.08 ‰ with average of -45.82 ‰ for δ2H. Based on the result, the relation between δ18O and δ2H, and δ18O and Br, approve discharge of saline water from KPA to KPL. Likewise, the isotopic composition of δ34SO4, varies from 5.95 to 22.55 ‰ CDT in KPA, and 5.95 to 9.99 ‰ CDT in KPL. Also, the relation between δ18O- δ34SSO4 and Cl- δ34S were non-linear, indicating that sulphur concentration in KPA and KPL changed due to sulphide oxidation and sulphate reduction in the freshwater and deep brines in the aquifer and mixed during the over-pumping in the KPA. Oxidation of sulphide minerals such as galena (PbS), and Chalcopyrite (CuFeS2) may have been the source of sulfur in Dore mine in western part of the aquifer (recharge zone) leached by seasonal runoff. In general, water–rock interaction, ion exchange, and hydraulic gradient have been the dominating factors in changing the water chemistry between aquifer and playa leading to saline groundwater discharged to the playa.

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Use of isotopes techniques to reveal the origin of water salinity in an arid region of Central-Western Argentina

Cited by 14 publications

References 29 publications

Agricultura y movilidad en la frontera suroriental del imperio incaico: contribuciones bioarqueológicas del sitio Agua Amarga (Valle de Uco)

Agricultura y movilidad en la frontera suroriental del imperio incaico: contribuciones bioarqueológicas del sitio Agua Amarga (Valle de Uco)

A Decade of Hydrological Drought in Central-Western Argentina

Origins And Processes of Groundwater Salinization Beneath Playa Lake Aquifers In Iran: A Chemical And Stable Isotope Approach

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