Estimation of Green-Ampt Effective Hydraulic Conductivity for Rangelands

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...

Green-Ampt infiltration model for sloping surfaces

[1] This work quantifies and explains the direct physical effects of slope angle on infiltration and runoff generation by extending the Green-Ampt equation onto sloping surfaces. A new extended solution using identical precipitation hydrographs was compared to the original formulation and then used to calculate the infiltration and runoff generation for different slope angles but for identical ...

Estimation of Hydraulic Conductivity without Computing Fluxes

Field estimates of the hydraulic conductivity (K) have large variances resulting from interpolating and differencing errors, in addition to instrumental and other errors in the observed water contents (8) and pressure heads (h). The resulting total error can easily be larger than the estimated value of K, thus producing poor results when analytical functions are fitted to the data. In contrast ...

Hydraulic conductivity measurment for subsurface drainage system

Effective saturated hydraulic conductivity of two-dimensional random multifractal fields

[1] A means of upscaling the effective saturated hydraulic conductivity, hKi, based on spatial variation in the saturated hydraulic conductivity (K) field is essential for the application of flow and transport models to practical problems. Multifractals are inherently scaling and thus may offer solutions to this dilemma. Random two-dimensional geometrical multifractal fields (multifractal Sierp...