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Revista Brasileira de Ciência do Solo
On-line version ISSN 1806-9657
GUBIANI, Paulo Ivonir et al. Falling head permeameter and software to determine the hydraulic conductivity of saturated soil. Rev. Bras. Ciênc. Solo [online]. 2010, vol.34, n.3, pp.993-997. ISSN 1806-9657. http://dx.doi.org/10.1590/S0100-06832010000300041.
The soil saturated hydraulic conductivity (Kθs) is a property with great variability, which requires the use of a greater number of determinations so that they can be described by the normal probability density function. Consequently, there is an increase in time and labor to obtain Kθs results if determined by conventional equipment. The use of more practical equipment and computational tools allows a faster and more accurate analysis. With this aim a falling head permeameter was built and a software for data acquisition was developed. Values of Kθs obtained with this equipment in Hapludalf samples showed less variability, as assessed by the coefficient of variation, resulting in more precise measurements. Moreover, the time of analysis was reduced by 30 %.
Keywords : hydric properties; software; methods.