Results 211 to 220 of about 20,125 (259)
Some of the next articles are maybe not open access.
Nonisothermal Models for Soil–Water Retention Curve
Journal of Geotechnical and Geoenvironmental Engineering - ASCE, 2018AbstractSeveral emerging problems in geotechnical and geoenvironmental engineering pose multiphysics problems involving nonisothermal processes in unsaturated soils.
Farshid Vahedifard +2 more
exaly +2 more sources
Hysteresis and Uncertainty in Soil Water-Retention Curve Parameters
Journal of Geotechnical and Geoenvironmental Engineering - ASCE, 2014AbstractAccurate estimates of soil hydraulic parameters representing wetting and drying paths are required for predicting hydraulic and mechanical responses in a large number of applications. A comprehensive suite of laboratory experiments was conducted to measure hysteretic soil-water characteristic curves (SWCCs) representing a wide range of soil ...
Jonathan Godt, Ning Lu, William Likos
exaly +2 more sources
Revisiting laboratory methods for measuring soil water retention curves
Soil Science Society of America Journal, 2023Abstract Traditional laboratory methods for measuring soil water retention curves (SWRCs) typically consist of suction tables, pressure cells, and pressure plate apparatus (i.e., traditional methods). However, technological advancement has resulted in newer methods based on precision mini‐tensiometers and dew ...
Parker, Nathaniel, Patrignani, Andres
openaire +1 more source
Closing the Loop of the Soil Water Retention Curve
Journal of Geotechnical and Geoenvironmental Engineering, 2015AbstractThe authors, to their knowledge for the first time, produced two complete principal soil water retention curves (SWRCs) under both positive and negative matric suction regimes. An innovative testing technique combining the transient water release and imbibition method (TRIM) and constant flow method (CFM) was used to identify the principal ...
N. Lu +3 more
openaire +1 more source
A new equation for the soil water retention curve
European Journal of Soil Science, 2014Summary The soil water retention curve is a fundamental characteristic of unsaturated zone flow and transport properties. Recent studies show that an air‐entry value is needed in a soil water retention equation in order to provide a better prediction of relative hydraulic conductivity. A new equation considering the air‐entry value is
Jiao, JJJ, Kuang, X
openaire +3 more sources
Temperature Dependence of Soil Water Retention Curves
Soil Science Society of America Journal, 1986Abstract Effects of entrapped air volume and surface tension of soil solution are often regarded as the primary cause of temperature effects on the water retention curve. A procedure was developed to determine simultaneously the water characteristic curves and the volume of entrapped air for a glass beads medium and a Norfolk sandy ...
J. W. Hopmans, J. H. Dane
openaire +1 more source
2018
Soil/water retention curve (SWRC) is the relationship between soil/water matric potential and volumetric soil-water content at equilibrium above the reference (zero) level represented by the free water table at atmospheric pressure. SWRC is the basic soil characteristic needed as input data for simulation models. SWRCs have a hysteresis-like character,
Viliam Novák, Hana Hlaváčiková
openaire +1 more source
Soil/water retention curve (SWRC) is the relationship between soil/water matric potential and volumetric soil-water content at equilibrium above the reference (zero) level represented by the free water table at atmospheric pressure. SWRC is the basic soil characteristic needed as input data for simulation models. SWRCs have a hysteresis-like character,
Viliam Novák, Hana Hlaváčiková
openaire +1 more source
A conceptual model of the soil water retention curve
Water Resources Research, 1998A conceptual model based on the assumption that soil structure evolves from a uniform random fragmentation process is proposed to define the water retention function. The fragmentation process determines the particle size distribution of the soil. The transformation of particles volumes into pore volumes via a power function and the adoption of the ...
Assouline, S., Tessier, D., Bruand, Ary
openaire +2 more sources
An Improved Volume Measurement for Determining Soil Water Retention Curves
Geotechnical Testing Journal, 2007Abstract The complete determination of soil water retention curves requires the sample volume to be measured in order to calculate its void ratio and degree of saturation. During drying in the pressure plate apparatus, cracks often appear in the sample altering its deformation and evaporation patterns.
Péron, H., Hueckel, T., Laloui, L.
openaire +2 more sources
Determination of the Soil Water Retention Curve with Tensiometers
2007An alternative technique for the determination of the soil water retention curve has recently been proposed whereby a tensiometer is used to measure soil suction and a balance to record the water content variations. The soil water retention curve is obtained by drying the soil either continuously or by stages (i.e.
Gallipoli, D +4 more
openaire +2 more sources