Unsaturated Hydraulic Conductivity from Cumulative Inflow Data
1974
Ahuja, L. R.
A method of determining the wetting-phase unsaturated hydraulic conductivity K(θ) from the data of cumulative inflow into a uniform soil core when water enters through a porous plate of high hydraulic resistance is described and evaluated. The method is based on piecewise application of the Green and Ampt (1911) approach to the above process of infiltration. The K(θ) determined by this technique from the numerical-solution inflow data of Yolo light clay were within 20% of the K(θ) values actually used in obtaining the numerical solution in two different cases of hydraulic resistance. Similar analysis of the experimental inflow data of Salkum silty clay loam for four different hydraulic resistances yielded the K(θ) data which closely agreed with the K(θ) values determined by detailed analysis of the soil-water content transients.
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