Field techniques for measuring soil hydraulic properties in unsaturated soils

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...

An Analysis on Soil Properties on Predicting Critical Hydraulic Gradients for Piping Progression in Sandy Soils

An Analysis on Soil Properties on Predicting Critical Hydraulic Gradients for Piping Progression in Sandy Soils By Tammy Jacobson, Master of Science Utah State University 2013 Major Professor: Dr. John Rice Department: Civil and Environmental Engineering Piping is a form of internal erosion in which soil particles are eroded at a seepage exit location due to the forces imposed on the particles ...

Unsaturated hydraulic conductivity function based on a soil fragmentation process

We present a new two-parameter expression for relative hydraulic conductivity (RHC) of partially saturated soils. It is based on the premise of Assouline et al. [1998] that soil structures evolve from a uniform random fragmentation process. This assumption allows us to derive hydraulic properties of soils (water retention curves and unsaturated hydraulic conductivity) from primary properties, s...

Relationships between soil physicochemical, microbiological properties, and nutrient release in buffer soils compared to field soils.

The retention of nutrients in narrow, vegetated riparian buffer strips (VBS) is uncertain and underlying processes are poorly understood. Evidence suggests that buffer soils are poor at retaining dissolved nutrients, especially phosphorus (P), necessitating management actions if P retention is not to be compromised. We sampled 19 buffer strips and adjacent arable field soils. Differences in nut...