Random forest, M5P and regression analysis to estimate the field unsaturated hydraulic conductivity

Effective Unsaturated Hydraulic Conductivity

Steady-state and transient one-dimensional unsaturated flow in vertically stratified porous media are examined. Saturated hydraulic conductivity and the alpha parameter of the exponential hydraulic conductivity function were assumed to vary from soil layer to soil layer. The use of effective unsaturated hydraulic conductivity to compute matric potential in the soil profile is demonstrated. Resu...

Measurement and Modeling of Unsaturated Hydraulic Conductivity

Field Determined Variation of the Unsaturated Hydraulic Conductivity Functions Using Simplified Analysis of Internal Drainage Experiments

Experimentally determined values of unsaturated soil hydraulic conductivity are presented for an Alfisol of the county of Piracicaba, S.P., Brazil. Simultaneous measurements of soil water content and pressure head are made along a 125 m transect within an irrigated field during the internal drainage process. Calculations of the soil hydraulic conductivity were made using the instantaneous profi...

Unsaturated Hydraulic Conductivity of Fractal-Textured Soils

A concise parameterization of the hydraulic conductivity of unsaturated soils

The parameter n in the well-known expression for hydraulic conductivity K ˆ K0S e (where K0 is its value at satiation and Se the e€ective saturation) is determined as a function of the exponent in the power form of the soil±water retention relationship. The result is validated with an extensive experimental database comprising some 43 soils, collected by Mualem. Ó 2000 Elsevier Science Ltd. All...