
%0 Journal Article
%A Reichardt, K. 
%A Timm, L. C. 
%A Bacchi, O. O. S. 
%A Oliveira, J. C. M. 
%A Dourado-Neto, D. 
%T A parameterised equation to estimate soil hydraulic conductivity in the field
%J Soil Research
%D 2004/05/13
%V 42
%N 3
%P 283-287
%K unit gradient, internal drainage, soil water storage.
%R https://doi.org/10.1071/SR03117
%U https://www.publish.csiro.au/paper/SR03117 
%X The description of soil water dynamics using the Darcy&#8211;Buckingham approach involves the determination and use of soil hydraulic conductivity K v. soil water content &#952; functions. Many of the methods developed for the measurement of K are based on simplifying assumptions, such as the unit gradient and the choice of fixed models for the K(&#952;) relation. The need of quick, simple, and inexpensive methods to measure K(&#952;) in the field using a large number of replicates has also led soil physicists to develop simple methods. This paper presents a procedure that makes use of parameters of equations used to explain the internal water drainage process, and that naturally leads to the exponential character of the K(&#952;) relation. Results show that the parameterised equation represents a more rigorous estimation of K(&#952;), compared with the methods that assume unit gradient. 
