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Spatial Variability of Unsaturated Hydraulic Conductivity
Author(s) -
Stockton J. G.,
Warrick A. W.
Publication year - 1971
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1971.03615995003500050058x
Subject(s) - hydraulic conductivity , loam , moisture , spatial variability , soil science , conductivity , vadose zone , water content , standard deviation , hydraulic head , pressure head , environmental science , hydrology (agriculture) , geotechnical engineering , materials science , geology , mathematics , soil water , statistics , thermodynamics , chemistry , composite material , physics
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.