UNIT GRADIENT OF THE HYDRAULIC POTENTIAL AS A SOURCE OF ERROR IN OBTAINING THE HYDRAULIC CONDUCTIVITY OF AN UNSATURATED SOIL

Authors
PREVEDELLO CL REICHARDT K CORDEIRO DG MELO EFR SCHEFFER M
Citation
Cl. Prevedello et al., 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), 1994, pp. 275-280
Citations number
NO
Categorie Soggetti
Agriculture,"Agriculture Dairy & AnumalScience
Journal title
Pesquisa agropecuaria brasileira → ACNP
ISSN journal
0100204X
Volume
29
Issue
2
Year of publication
1994
Pages
275 - 280
Database
ISI
SICI code
0100-204X(1994)29:2<275:UGOTHP>2.0.ZU;2-6
Abstract
Water redistribution within homogeneous soil columns was evaluated by the instantaneous profile method. This experiment was conducted to qua ntify the errors associated with measurements of the hydraulic conduct ivity 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 w ater contents. Unsaturated hydraulic conductivity was underestimated b y as much as 73%.