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Estimation of water percolation by different methods using TDR Rev. Bras. Ciênc. Solo
Silva,Alisson Jadavi Pereira da; Coelho,Eugênio Ferreira.
Detailed knowledge on water percolation into the soil in irrigated areas is fundamental for solving problems of drainage, pollution and the recharge of underground aquifers. The aim of this study was to evaluate the percolation estimated by time-domain-reflectometry (TDR) in a drainage lysimeter. We used Darcy's law with K(θ) functions determined by field and laboratory methods and by the change in water storage in the soil profile at 16 points of moisture measurement at different time intervals. A sandy clay soil was saturated and covered with plastic sheet to prevent evaporation and an internal drainage trial in a drainage lysimeter was installed. The relationship between the observed and estimated percolation values was evaluated by linear regression...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Internal drainage; Unsaturated hydraulic conductivity; Instantaneous profile; Time domain reflectometry.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000100007
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