Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/jspui/handle/123456789/12153
Title: Natural background levels and validation of the assessment of intrinsic vulnerability to the contamination in the Carste Lagoa Santa Protection Unit, Minas Gerais, Brazil.
Authors: Cardoso, Frederico Aragão
Velásquez, Leila Nunes Menegasse
Galvão, Paulo Henrique Ferreira
Tayer, Thiaggo de Castro
Lucon, Thiago Nogueira
Azevedo, Úrsula Ruchkys de
Keywords: Karst aquifer
Groundwater contamination
Issue Date: 2020
Citation: CARDOSO, F. A. et al. Natural background levels and validation of the assessment of intrinsic vulnerability to the contamination in the Carste Lagoa Santa Protection Unit, Minas Gerais, Brazil. Environmental Earth Sciences, v. 79, n. 31, 2020. Disponível em: <https://link.springer.com/article/10.1007/s12665-019-8771-5>. Acesso em: 10 mar. 2020.
Abstract: The contamination of karst aquifers by anthropogenic activities causes a major issue regarding environmental policies, since they present high sensitivity, influenced by unique features such as dolines, swallow holes, and conduits. This paper is focused on the Carste Lagoa Santa Protection Unit, MG, Brazil, and presents three main objectives: to determine the natural background levels of chloride, nitrate, sulfate, and phosphate; to indicate the locations where the concentrations of those parameters exceed the natural background levels in the existing vulnerability map and, finally, to determine the proportion of the areas (in percentage) where this surpassing occurs, according to the vulnerability classes (high, moderate and low). Results have shown values (90th percentile) of 2.4 mg/L, 1.0 mg/L, 5.3 mg/L, and 0.1 mg/L, for Cl−, NO3−, SO4−2, and PO4−3, respectively, indicating that for all four parameters, there were areas (mainly distributed within moderate vulnerability portions) where the values were surpassed, which suggests anthropogenic activity due to the presence of urban settlements and agricultural activities. Therefore, the proposal of natural background levels was essential to understand the hydrochemistry of the studied region.
URI: http://www.repositorio.ufop.br/handle/123456789/12153
metadata.dc.identifier.uri2: https://link.springer.com/article/10.1007/s12665-019-8771-5
metadata.dc.identifier.doi: https://doi.org/10.1007/s12665-019-8771-5
ISSN: 1866-6299
Appears in Collections:DEGEO - Artigos publicados em periódicos

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