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The water cycle of small catchments impacted with tailings mudflows: A study in the Ferro-Carvão watershed after the breakup of B1 dam in Brumadinho.
Pereira, Polyana; Fernandes, Luís Filipe Sanches; do Valle Junior, Renato Farias; de Melo Silva, Maytê Maria Abreu Pires; Valera, Carlos Alberto; de Melo, Marília Carvalho; Pissarra, Teresa Cristina Tarlé; Pacheco, Fernando António Leal.
Afiliación
  • Pereira P; São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences, Jaboticabal. Via Prof. Paulo Donato Castellane, s/n, Jaboticabal 14884-900, SP, Brazil. Electronic address: polyana.pereira@unesp.br.
  • Fernandes LFS; Centre for the Research and Technology of Agro-Environmental and Biological Sciences-CITAB, University of Trás-os-Montes and Alto Douro (UTAD), Ap. 1013, 5001-801 Vila Real, Portugal. Electronic address: lfilipe@utad.pt.
  • do Valle Junior RF; Geoprocessing Laboratory, Uberaba Campus, Federal Institute of Triângulo Mineiro (IFTM), Uberaba 38064-790, MG, Brazil. Electronic address: renato@iftm.edu.br.
  • de Melo Silva MMAP; Geoprocessing Laboratory, Uberaba Campus, Federal Institute of Triângulo Mineiro (IFTM), Uberaba 38064-790, MG, Brazil. Electronic address: mayte@iftm.edu.br.
  • Valera CA; Coordenadoria Regional das Promotorias de Justiça do Meio Ambiente das Bacias dos Rios Paranaíba e Baixo Rio Grande, Rua Coronel Antônio Rios, 951, Uberaba, MG 38061-150, Brazil.
  • de Melo MC; Secretaria de Estado de Meio Ambiente e Desenvolvimento Sustentável, Cidade Administrativa do Estado de Minas Gerais, Rodovia João Paulo II, 4143, Bairro Serra Verde-Belo Horizonte, Minas Gerais, Brazil. Electronic address: marilia.melo@meioambiente.mg.gov.br.
  • Pissarra TCT; São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences, Jaboticabal. Via Prof. Paulo Donato Castellane, s/n, Jaboticabal 14884-900, SP, Brazil. Electronic address: teresa.pissarra@unesp.br.
  • Pacheco FAL; Chemistry Centre of Vila Real - CQVR, University of Trás-os-Montes and Alto Douro (UTAD), Ap. 1013, 5001-801 Vila Real, Portugal. Electronic address: fpacheco@utad.pt.
Sci Total Environ ; 949: 174971, 2024 Nov 01.
Article en En | MEDLINE | ID: mdl-39069187
ABSTRACT
The B1 tailings dam of Córrego do Feijão iron-ore mine owned by Vale, S.A. company collapsed in 25 January 2019 releasing to the Ferro-Carvão stream watershed (32.6 km2) as much as 11.7 Mm3 of mine waste. A major share (8.9 Mm3) has been deposited along the stream channel and margins forming a 2.7 km2 patch. The main purpose of this study was to question whether the tailings deposit impacted the local water cycle and how. Using the Soil and Water Assessment Tool (SWAT) hydrologic model, the water balance components of 36 hydrologic response units (HRU) were calculated for pre- (S1) and post- (S2) B1 dam rupture scenarios represented by appropriate soil, land use and tailings cover. The results revealed an increase of evapotranspiration from S1 to S2, related to the sudden removal of vegetation from the stream valley and replacement with a blanket of mud, which raised the exposure of Earth's surface to sunlight and hence soil evaporation. For 11 HRU (10.3 km2) located around the tailings deposit, a decrease in lateral flow was observed, accompanied by an increase in percolation and a slight increase in groundwater flow. In this case, the water balance changes observed between S1 and S2 reflected a barrier effect imposed to the lateral flows by the tailings, which shifted the flows towards the vertical direction (percolation). Thus, the water followed an easier vertical route until reaching the shallow aquifer and being converted into groundwater flow. As per the modelling outcomes, the hydrologic impacts of B1 dam rupture are relevant because they affected 1/3 of Ferro-Carvão stream watershed, and hence claim for the complete removal of the tailings.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Total Environ Año: 2024 Tipo del documento: Article Pais de publicación: Países Bajos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Total Environ Año: 2024 Tipo del documento: Article Pais de publicación: Países Bajos