1971•Soil Science Society of America JournalRequires access

Spatial Variability of Unsaturated Hydraulic Conductivity

J. G. Stockton, Arthur Will Warrick

Abstract

Abstract Spatial variability of unsaturated hydraulic conductivity was studied for 40 ha of Pima clay loam. Calculations of hydraulic conductivity were based on the moisture release data using a modified Millington‐Quirk equation. One standard deviation to either side of the average moisture release curve resulted in a 20 to 30% variation in the unsaturated hydraulic conductivity. This offers a relatively quick and easy method for estimating variability of unsaturated hydraulic conductivity variation from pressure head vs. moisture relations. Input needed for application: moisture release relations and their variances.

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Key concepts: Hydraulic conductivity, Loam, Moisture, Spatial variability, Soil science, Conductivity, Vadose zone, Water content