Data/hora: 08/06/2024 13:26:36

Biblioteca(s): | Epagri-Sede.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | Nacional - B
Data corrente: | 25/01/2021
Data da última atualização: | 25/01/2021
Autoria: | PIAZZA, G. A.; DUPAS, R.; GASCUEL-ODOUX, C.; PINHEIRO, A.; KAUFMAN, V.; BLAINSKI, É.
Título: | Variability of hydro-chemical response to storm events captured using highfrequency river monitoring in subtropical catchments, southern Brazil.
Ano de publicação: | 2020
Fonte/Imprenta: | Revista de Gestão de Água da América Latina, Porto Alegre, v. 17, n. 20, p. 1-15, 2020.
Idioma: | Inglês

Conteúdo:

High-frequency (30 min) data was used to investigate storm responses in two subtropical catchments in the Brazilian Atlantic Forest. We measured discharge, turbidity and conductivity in a 30 km2
subsurface-dominated catchment (2012-2013) and in a 48 km2 groundwater-dominated catchment (2014-2016). Conductivity was dominated by elements associated with geochemical weathering or atmospheric deposition, but also nutrients such as nitrate. Turbidity was a proxy for suspended sediment. Results showed similar dominant storm event patterns in both catchments. The dominant pattern for turbidity was a positive C-Q relationship with clockwise hysteresis, suggesting a nearby source, while the dominant pattern for conductivity was a negative C-Q relationships with clockwise hysteresis, suggesting storage of solutes in deep groundwater and distant sources (hillside). The negative C-Q pattern for conductivity was stronger and the hysteresis wider in the groundwater-dominated catchment. Hydroclimatic controls were also similar between both catchments, but storm event patterns in the subsurface-dominated catchment were more strongly influenced by antecedent conditions (conditions before the event) that in the groundwater dominated catchment.

Palavras-Chave: | conductivity; High-frequency monitoring; storm events; turbidity.
Categoria do assunto: | P Recursos Naturais, Ciências Ambientais e da Terra
URL: | http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_48310.pdf
Registro original: | Epagri-Sede (Epagri-Sede)
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