Unit gradient of the hydraulic potential as a source of error in obtaining the hydraulic conductivity of an unsaturated soil

Authors

  • Celso Luiz Prevedello
  • Klaus Reichardt
  • Divonzil Gonçalves Cordeiro
  • Evanisa Fátima Reginato Quevedo Melo
  • Mariane Scheffer

DOI:

https://doi.org/10.1590/S1678-3921.pab1994.v29.4053

Keywords:

instantaneous profile method, soil water redistribution, soil water content, soil columns

Abstract

Water redistribution within homogeneous soil columns was evaluated by the instantaneous profile method. This experiment was conducted to quantify the errors associated with measurements of the hydraulic conductivity as a function of soil water when the assumption of unit gradient of the hydraulic potential is adopted. Within the range of soil water contents of the experiment, the errors increased with a decrease in water contents. Unsaturated hydraulic conductivity was underestimated by as much as 73%.

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Published

1994-02-01

How to Cite

Prevedello, C. L., Reichardt, K., Cordeiro, D. G., Melo, E. F. R. Q., & Scheffer, M. (1994). Unit gradient of the hydraulic potential as a source of error in obtaining the hydraulic conductivity of an unsaturated soil. Pesquisa Agropecuaria Brasileira, 29(2), 275–280. https://doi.org/10.1590/S1678-3921.pab1994.v29.4053

Issue

v.29, n.2, fev. 1994

Section

SOIL SCIENCE