SURFACE WATER QUALITY AS A FUNCTION OF LAND USE AND OCCUPATION IN TWO SUB-BASINS IN THE SOUTHERN AMAZON

Autores

  • Roselene Maria Schneider roselene.schneider@ufmt.br
    Postgraduate Program in Environmental Sciences, Federal University of Mato Grosso, Sinop, MT, Brazil. / Institute of Agricultural and Environmental Sciences, Federal University of Mato Grosso, Sinop, MT, Brazil. https://orcid.org/0000-0002-3167-5997
  • Francielle Zerbinatto da Silva zerbinatto21@gmail.com
    Postgraduate Program in Environmental Sciences, Federal University of Mato Grosso, Sinop, MT, Brazil. https://orcid.org/0009-0003-7941-0386
  • Guilherme Fernando Sanches guimafsanches07@gmail.com
    Institute of Agricultural and Environmental Sciences, Federal University of Mato Grosso, Sinop, MT, Brazil. https://orcid.org/0009-0005-1711-2214
  • Larissa Gabriela Portiliotti De Paula larissaportiliotti@gmail.com
    Institute of Agricultural and Environmental Sciences, Federal University of Mato Grosso, Sinop, MT, Brazil. https://orcid.org/0009-0005-9431-0177
  • Guilherme Modesto Santana guilherme.santana@sou.ufmt.br
    Institute of Agricultural and Environmental Sciences, Federal University of Mato Grosso, Sinop, MT, Brazil. https://orcid.org/0009-0006-7063-2929
  • Daniela Roberta Borella drborella@gmail.com
    Postgraduate Program in Environmental Sciences, Federal University of Mato Grosso, Sinop, MT, Brazil. / Institute of Forests, Federal Rural University of Rio de Janeiro, Seropédica, RJ, Brazil. https://orcid.org/0000-0003-2941-2116
  • Adilson Pacheco de Souza adilson.souza@ufmt.br
    Postgraduate Program in Environmental Sciences, Federal University of Mato Grosso, Sinop, MT, Brazil. / Faculty of Agronomy and Animal Science, Federal University of Mato Grosso, Cuiabá, MT, Brazil. https://orcid.org/0000-0003-4076-1093

DOI:

https://doi.org/10.31413/nat.v14i4.22004


Palavras-chave:

índice de qualidade da água, LULC, bacias hidrográficas agrícolas, transição Cerrado-Amazônia

Resumo

Qualidade das águas superficiais em função do uso e ocupação do solo em duas bacias hidrográficas no Sul da Amazônia

 

RESUMO: O monitoramento da qualidade da água é essencial para conhecer e avaliar suas características físicas, químicas e microbiológicas, considerando as variações espaciais e temporais decorrentes do clima, solo e do uso e cobertura da terra. Considerando o exposto, objetivou-se avaliar se a qualidade da água superficial é afetada pelo uso e pela cobertura da terra nas bacias hidrográficas Renato e Caiabi, na região sul da Amazônia. O índice de qualidade da água (WQI) e o índice de estado trófico (TSI) foram determinados em oito pontos no rio Renato e em cinco no rio Caiabi, nas quatro transições sazonais (chuva, chuva-seca, seca e seca-chuva), seguindo as metodologias do Standard Methods for Examination of Water and Wastewater. O rio Renato apresentou índice de conformidade da qualidade da água superior a 90%, e o Caiabi, de 90,45%, ambos classificados como rios de Classe 2. Para ambos os rios, os parâmetros de temperatura, pH ácido, baixa condutividade elétrica, turbidez, nitrogênio e clorofila-a indicaram a ausência de lançamento de efluentes. O oxigênio dissolvido, a demanda bioquímica de oxigênio, o carbono orgânico total, os coliformes termotolerantes, os sólidos suspensos e dissolvidos totais apresentaram maior variabilidade sazonal, sem ultrapassar os limites normativos. Os rios Renato e Caiabi apresentaram WQI bom e TSI oligotrófico, indicando baixo potencial de eutrofização e ausência de interferências indesejáveis nos usos da água, mesmo diante do expressivo uso e da cobertura do solo nas bacias.

Palavras-chave: índice de qualidade da água; LULC; bacias hidrográficas agrícolas; transição Cerrado-Amazônia.

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2026-10-23

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Ciências Ambientais / Environmental Sciences

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SURFACE WATER QUALITY AS A FUNCTION OF LAND USE AND OCCUPATION IN TWO SUB-BASINS IN THE SOUTHERN AMAZON. (2026). Nativa, 14(4), e22004. https://doi.org/10.31413/nat.v14i4.22004

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