Results 171 to 180 of about 922,701 (227)

Sustainable valorization of waste polystyrene and PVC blends for high-performance applications. [PDF]

Sci Rep
Shafik ES.
europepmc   +1 more source

Hydrodynamic Characterisation of the Inland Valley Soils of the Niger Delta Area for Sustainable Agricultural Water Management. [PDF]

Sensors (Basel)
Osame PU, Asim T.
europepmc   +1 more source

Laboratory measurement of hydraulic conductivity functions of two unsaturated sandy soils during drying and wetting processes [PDF]

Soils and Foundations, 2013
The importance of applying unsaturated soil mechanics to geotechnical engineering design has been well understood. However, the consumption of time and the necessity for a specific laboratory testing apparatus when measuring unsaturated soil properties ...
Chaminda Gallage, Taro Uchimura, Jayantha Kodikara   +2 more
exaly   +3 more sources

Wetting front advancing column test for measuring unsaturated hydraulic conductivity

Canadian Geotechnical Journal, 2009
Unsaturated hydraulic conductivity is the primary soil parameter required when performing seepage analyses for unsaturated-saturated soil systems. Unsaturated hydraulic conductivity is also one of the most difficult parameters to measure because of the ...
Yanjie Ji, D G Fredlund
exaly   +2 more sources

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ONE-PARAMETER MODELS FOR UNSATURATED HYDRAULIC CONDUCTIVITY

Soil Science, 1998
Simple one-parameter models for predicting changes in unsaturated soil hydraulic properties with changing soil-water content are useful, considering the great uncertainty and variability in the hydraulic parameters, and the models are often used for stochastic simulations of water and solute transport under field conditions.
Poulsen, T.G., Moldrup, P., Jacobsen, Ole Hørbye   +2 more
openaire   +3 more sources

Unsaturated Hydraulic Conductivity of Landfilled Waste

Unsaturated Soils 2006, 2006
Unsaturated flow modelling of landfill hydraulics is a potentially valuable tool for the prediction of leachate discharge rates, design of leachate control systems and simulation of biodegradation in engineered landfills. Such an approach requires information on the moisture retention and hydraulic properties of waste, usually in the form of empirical ...
Y. K. Kazimoglu, J. R. McDougall, I. C. Pyrah   +2 more
openaire   +1 more source

Spatial Variability of Unsaturated Hydraulic Conductivity

Soil Science Society of America Journal, 1971
Abstract Spatial variability of unsaturated hydraulic conductivity was studied for 40 ha of Pima clay loam. Calculations of hydraulic conductivity were based on the moisture release data using a modified Millington‐Quirk equation.
J. G. Stockton, A. W. Warrick
openaire   +1 more source

Measurement of Subsurface Unsaturated Hydraulic Conductivity

Journal of Irrigation and Drainage Engineering, 2000
Measurement of unsaturated hydraulic conductivity is needed for precise control of water and solutes in the vadose zone. Because of the spatial variation of soils, a large number of surface and subsurface measurements are needed to characterize a field. In this work, permeameters were developed and tested for estimating subsurface unsaturated hydraulic
D. F. Holland, M. Yitayew, A. W. Warrick
openaire   +1 more source

Effective unsaturated hydraulic conductivity of layered sands

Water Resources Research, 1990
Accurate estimates of field‐scale hydraulic conductivities of unsaturated heterogeneous soils are very difficult to obtain. In the present study, various approaches to determining effective conductivity values for heterogeneous sands are compared with laboratory measurements.
T.‐C. Jim Yeh, Donald J. Harvey
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BIMODAL POROSITY AND UNSATURATED HYDRAULIC CONDUCTIVITY

Soil Science, 1991
Soil water characteristic curves determined on undisturbed soil samples in the laboratory were used for the calculation of the unsaturated conductivity function K(h). This computed K(h) was compared to the unsaturated conductivity data measured directly in the field.
HEINRICH OTHMER, BERND DIEKKRÜGER, MIROSLAV KUTILEK   +2 more
openaire   +1 more source