Predicting adverse scenarios for a transboundary coastal aquifer system in the Atacama Desert (Peru/Chile)

Narvaez-Montoya, Christian; Torres-Martínez, Juan Antonio; Pino-Vargas, Edwin; Cabrera-Olivera, Fredy; Loge, Frank J.; Mahlknecht, Jürgen

doi:10.1016/j.scitotenv.2021.150386

Cited by 18 publications

(15 citation statements)

References 47 publications

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“…However, the occurrence of more chlorinated sodium samples is observed in clusters 3 and 4. The distribution of group 4 (Cl − >> Na + ) towards the coastline confirms that a large volume of saltwater intrusion is estimated at the SW of the aquifer [26].…”

Section: Cluster Relative Abundancesupporting

confidence: 71%

“…In this study, the first campaign was performed in August 2020 (dry season), while the second was in November 2020 (wet During the last two decades, the water level has declined due to groundwater overuse, and consequently, there was seawater intrusion in the aquifer. In the coming years, the water level will continue to drop from 0.23 to 0.38 m/year, and saline intrusion will be five times higher (56-59 hm 3 /year), increasing groundwater quality deterioration [23,26].…”

Section: Monitoring Network and Samplingmentioning

confidence: 99%

“…For clusters 1 and 2, the water samples close to the coastline experience Cl − -SO 4 2− ion exchange (Figure 7b). These waters contain the highest TDS of the entire sampling network and are influenced by very salty water as a product of seawater intrusion [23,26,32]. However, cluster 2 (SO 4 2− ≥ Cl − >> Ca 2+ ) waters reappear in the middle part of the aquifer, with hydrochemical values similar to cluster 3 (SO 4 2− >> Cl − ).…”

Section: Factorial Analysismentioning

confidence: 99%

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Hydrodynamics, Hydrochemistry, and Stable Isotope Geochemistry to Assess Temporal Behavior of Seawater Intrusion in the La Yarada Aquifer in the Vicinity of Atacama Desert, Tacna, Peru

Vera

Pino-Vargas

Verma³

et al. 2021

Water

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The La Yarada aquifer is the primary water resource for municipal, irrigation, and industrial uses in the semi-arid Tacna, Peru. Presently, over-pumping has caused severe groundwater management problems, including the abandonment of saline water wells. This study presents multivariate analysis and chemical–isotopic trends in water to investigate seawater intrusion and hydrogeological processes affecting water quality. The chemical and isotopic analysis of water samples, collected in two campaigns in the dry (August 2020) and wet (November 2020) seasons, together with the 1988 data, were evaluated with a mixing model, cluster, and factor analysis. The hydrochemical and isotopic mixing model suggested the formation of a wedge with 20% seawater intrusion. The heterogeneity of piezometric map isolines corroborates the wedge formation associated with the groundwater movement. The spatial distributions of factors, FA1 and FA2, suggest two processes of seawater front movement: dispersion (diffusion) of chemical elements and different types of water mixing, respectively. At the edge of the La Yarada aquifer, the water head was relatively low, permitting seawater and freshwater mixing. On the other hand, along the sea-land boundary, the water head of the La Yarada aquifer was relatively high, avoiding seawater and freshwater mixing; however, the chemical species were migrating from the seawater to the groundwater due to the diffusion processes. The cluster 4 samples are in the region corresponding to the isotopic mixing process represented by the FA2, while cluster 4 describes the chemical diffusion process represented by the FA2. Thus, the integrated approach is helpful to assess the seawater intrusion mechanisms in coastal aquifers in a semi-arid region.

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Section: Cluster Relative Abundancesupporting

confidence: 71%

Section: Monitoring Network and Samplingmentioning

confidence: 99%

Section: Factorial Analysismentioning

confidence: 99%

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Hydrodynamics, Hydrochemistry, and Stable Isotope Geochemistry to Assess Temporal Behavior of Seawater Intrusion in the La Yarada Aquifer in the Vicinity of Atacama Desert, Tacna, Peru

Vera

Pino-Vargas

Verma³

et al. 2021

Water

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“…gestión de la recarga y del uso adecuado del recurso [7,8]. En América del Sur, se ha incrementado en demasía la dependencia de los sistemas de abastecimiento, de las fuentes de agua subterránea; aunque es difícil de estimar los volúmenes de extracción desde los acuíferos debido a que la mayoría de pozos, tanto públicos como privados, no son monitoreados para control [9,10,11,12].…”

Section: Introductionunclassified

“…El acuífero costero Caplina, ubicado en el extremo norte del desierto de Atacama, no ha sido ajeno al impacto de los fenómenos indicados, constituyendo la crisis de gobernabilidad y gobernanza en la gestión del uso del agua subterránea un elemento que ha contribuido al agotamiento de las reservas y deterioro de la calidad del agua, no solo por contaminación de fuentes superficiales sino por procesos de intrusión de agua marina [9,10,14,15,16,17].…”

Section: Introductionunclassified

Evolución histórica de la conceptualización hidrogeológica y del uso del acuífero Caplina ubicado en el borde norte del desierto de Atacama

2021

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El acuífero Caplina, se ubica en el límite entre Perú y Chile y corresponde a la cabecera del desierto de Atacama, uno de los más áridos del mundo. En esta región costera, el agua subterránea abastece el 100 % de demanda agrícola. El acuífero se viene explotando por más 100 años, a tasas de extracción cada vez mayores, lo que ha generado un desbalance hídrico con el consiguiente proceso de contaminación por intrusión marina. En esta investigación se busca identificar la conceptualización hidrogeológica del sistema y su efecto en el manejo sostenible del agua subterránea. Esto permitirá establecer lineamientos para el manejo sostenible del agua subterránea, planteando medidas de tipo estructural y no estructural; las primeras, orientadas a afianzar artificialmente los recursos hídricos de recarga al acuífero; y las segundas, a establecer un plan de gestión y reordenamiento de extracciones, para precisar el volumen de extracción y las medidas estructurales a adoptar. Adicionalmente se debe incorporar criterios de educación ambiental, sensibilización y divulgación, orientados a la conservación y preservación del acuífero.

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Evapotranspiration, carbon dynamics and water use efficiency in a drip-irrigated olive orchard in arid coastal western South America

Tito,

Cruz,

Nina

et al. 2024

Agricultural Water Management

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Predicting adverse scenarios for a transboundary coastal aquifer system in the Atacama Desert (Peru/Chile)

Cited by 18 publications

References 47 publications

Hydrodynamics, Hydrochemistry, and Stable Isotope Geochemistry to Assess Temporal Behavior of Seawater Intrusion in the La Yarada Aquifer in the Vicinity of Atacama Desert, Tacna, Peru

Hydrodynamics, Hydrochemistry, and Stable Isotope Geochemistry to Assess Temporal Behavior of Seawater Intrusion in the La Yarada Aquifer in the Vicinity of Atacama Desert, Tacna, Peru

Evolución histórica de la conceptualización hidrogeológica y del uso del acuífero Caplina ubicado en el borde norte del desierto de Atacama

Evapotranspiration, carbon dynamics and water use efficiency in a drip-irrigated olive orchard in arid coastal western South America

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