Kozeny-Carman Equation and Hydraulic Conductivity of Compacted Clayey Soils

Estimating the saturated hydraulic conductivity in a spatially variable soil with different permeameters: a stochastic Kozeny–Carman relation

The spatial variability of the saturated hydraulic conductivity (Ks) of a greenhouse banana plantation volcanic soil was investigated with three different permeameters: (a) the Philip-Dunne field permeameter, an easy to implement and low cost device; (b) the Guelph field permeameter; (c) the constant head laboratory permeameter. Ks was measured on a 14×5 array of 2.5 m×5 m rectangles at 0.15 m ...

On the Validity of the Carman-kozeny Equation in Random Fibrous Media

The transverse permeability for creeping flow through unidirectional random arrays of fibers/cylinders has been studied numerically using the finite element method (FEM). A modified Carman-Kozeny (CK) relation is presented which takes into account the tortuosity (flow path) and the lubrication effect of the narrow channels. The proposed relation is valid in a wide range of porosities compared t...

Unsaturated Hydraulic Conductivity of Fractal-Textured Soils

Saturated Hydraulic Conductivity Prediction fromMicroscopic Pore Geometry Measurements and Neural NetworkAnalysis

Traditional models to describe hydraulic properties in soils are constrained by the assumption of cylindrical capillarity to account for the geometry of the pore space. This study was conducted to develop a new methodology to directly measure the porosity and its microscopic haracteristics. The methodology is based on the analysis of binary images collected with a backscattered electron detecto...

Scaling and Fractal Concepts in Saturated Hydraulic Conductivity: Comparison of Some Models

Measurement of soil saturated hydraulic conductivity, Ks, is normally affected by flow patterns such as macro pore; however, most current techniques do  not differentiate flow types, causing major problems in describing water and chemical flows within the soil matrix. This study compares eight models for scaling Ks and predicted matrix and macro pore Ks, using a database composed of 50 datasets...