Сontribution to the evaluation of some theoretical models, calculating hydraulic conductivity in unsaturated soils

Bourazanis George & Kerkides Petros, 2005. Сontribution to the evaluation of some theoretical models, calculating hydraulic conductivity in unsaturated soils, Department of Agricultural Development of Sparta & Laboratory of Agricultural Hydraulics, Department of Agricultural Development, Agricultural University of Athens.
(На англ. // Оценка некоторых теоретических моделей для расчета гидропроводности в ненасыщенных почвах).Researchers acknowledging the importance of the hydraulic conductivity in unsaturated and saturated soils, in other words the velocity of the water soil movement in deferent soils and soil water contents, and so the need for calculating this parameter for studies such as irrigation and draining scheduling, pollutants movement, etc. proposed many methods for obtaining hydraulic conductivity data.
From the direct and indirect methods that have been proposed the direct are most expensive and time consuming, than the indirect which are cost-effective, because they estimate hydraulic conductivity based on most easily obtained data, such us soil texture, water retention, bulk density, soil structure, soil mineralogy e.t.c). On the other hand the direct methods proved to be useful for more site-specific problems, than the indirect, which are preferable for large areas of lands and semi-detailed scales.