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Water 2017, 9(8), 569; https://doi.org/10.3390/w9080569

Identifying Groundwater Recharge Sites through Environmental Stable Isotopes in an Alluvial Aquifer

1
Doctorado en Ciencias de la Ingeniería, Universidad Autónoma de Zacatecas, Avda. Ramón López Velarde, 801, 98000 Zacatecas, Mexico
2
Centro del Agua para America Latina y el Caribe, Instituto Tecnológico y de Estudios Superiores de Monterrey, 64849 Monterrey, Mexico
*
Author to whom correspondence should be addressed.
Received: 26 June 2017 / Revised: 26 July 2017 / Accepted: 28 July 2017 / Published: 2 August 2017
(This article belongs to the Special Issue Isotopes in Hydrology and Hydrogeology)
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Abstract

Environmental isotope tracers have been a useful tool in providing new insights into hydrologic processes. In Mexico, there have been several studies reporting different values for δ 18 O and δ 2 H for certain geographical areas. The objective of this study is to achieve the isotopic characterization of rainfall and groundwater and to report the comprehensive understanding of groundwater flow processes around and within the Calera aquifer and, consequently, its potential recharge sites. The samples used for the stable isotope analysis ( δ 18 O , δ 2 H ) were measured using a GV-Isoprime isotope-ratio mass spectrometer at the Isotopy Laboratory of the Water Center for Latin America and the Caribbean. The δ D of precipitation ranged between −110.20‰ and 10.11‰, with a mean of −55.67‰ ± 27.81‰. The δ 18 O ranged between −17.80‰ and 2.74‰, with a mean of −9.44‰ ± 4.74‰. The δ D of groundwater ranged between −81.92‰ and −36.45‰, with a mean of −66.05‰ ± 8.58‰. The δ 18 O ranged between −18.26‰ and −8.84‰, with a mean of −12.35‰ ± 2.12‰. The local meteoric water line of the Zacatecas state is δ D = 2.03 + 5.68 δ 18 O . The groundwater samples were clustered into four groups. The clustering of the samples led to the finding that streamflows play a significant role in the hydrological balance as a source of local recharge to the aquifer. View Full-Text
Keywords: isotopic composition; recharge; groundwater; environmental isotopes; alluvial aquifer; deuterium; oxygen-18 isotopic composition; recharge; groundwater; environmental isotopes; alluvial aquifer; deuterium; oxygen-18
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González-Trinidad, J.; Pacheco-Guerrero, A.; Júnez-Ferreira, H.; Bautista-Capetillo, C.; Hernández-Antonio, A. Identifying Groundwater Recharge Sites through Environmental Stable Isotopes in an Alluvial Aquifer. Water 2017, 9, 569.

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