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Article

Using Geochemical Fingerprints for Assessing Sediment Source Apportionment in an Agricultural Catchment in Central Argentina

1
Grupo de Estudios Ambientales, IMASL-CONICET-UNSL, San Luis 5700, Argentina
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Departamento de Geología, UNSL, San Luis 5700, Argentina
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Instituto Tecnológico de Sonora (ITSON) Calle 5 de Febrero, 818, Ciudad Obregón 85000, Sonora, Mexico
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Instituto Nacional de Investigaciones Nucleares, Ocoyoacac 52750, Mexico, Mexico
*
Author to whom correspondence should be addressed.
Academic Editor: Chris Bradley
Water 2021, 13(24), 3632; https://doi.org/10.3390/w13243632
Received: 22 November 2021 / Revised: 5 December 2021 / Accepted: 14 December 2021 / Published: 17 December 2021
In the hilly semi-arid region of central Argentina, where the agricultural frontier expands at the expense of natural ecosystems, soil erosion is one of the most alarming environmental problems. Thus, obtaining knowledge about the dynamics of erosive processes and identifying erosion hotspots constitutes a primary scientific objective. This investigation is focused on estimating the apportionments of main sources of sediments, at the mouth of a small catchment called Durazno del Medio, located in the province of San Luis, Argentina. Elemental Analysis, measured by Energy Dispersive X-ray Fluorescence (EDXRF), was used to select potential geochemical fingerprints of sediment. The unmixing model MixSIAR was applied to approximate the contribution of each identified source in the sediment accumulation areas at the mouth of the catchment. Potential sediment sources were selected using two criteria: (i) a hierarchical approach to identify the main geomorphological units (GUs) and (ii) the main land uses (LU), recognized by examining satellite images and field recognitions. The selected geochemical tracers were able to distinguish sources located in the Crystalline basement hills with loess-patched (CBH) as the main sediment contributors. View Full-Text
Keywords: fingerprinting technique; mixing models; geomorphological units; geochemical concentrations; EDXRF fingerprinting technique; mixing models; geomorphological units; geochemical concentrations; EDXRF
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MDPI and ACS Style

Garcias, Y.; Torres Astorga, R.; Ojeda, G.; de los Santos Villalobos, S.; Tejeda, S.; Velasco, H. Using Geochemical Fingerprints for Assessing Sediment Source Apportionment in an Agricultural Catchment in Central Argentina. Water 2021, 13, 3632. https://doi.org/10.3390/w13243632

AMA Style

Garcias Y, Torres Astorga R, Ojeda G, de los Santos Villalobos S, Tejeda S, Velasco H. Using Geochemical Fingerprints for Assessing Sediment Source Apportionment in an Agricultural Catchment in Central Argentina. Water. 2021; 13(24):3632. https://doi.org/10.3390/w13243632

Chicago/Turabian Style

Garcias, Yanina, Romina Torres Astorga, Guillermo Ojeda, Sergio de los Santos Villalobos, Samuel Tejeda, and Hugo Velasco. 2021. "Using Geochemical Fingerprints for Assessing Sediment Source Apportionment in an Agricultural Catchment in Central Argentina" Water 13, no. 24: 3632. https://doi.org/10.3390/w13243632

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