A numerical experiment on pore size, pore connectivity, water retention, permeability, and solute transport using network models

2000 ◽  
Vol 51 (1) ◽  
pp. 99-105 ◽  
Author(s):  
H. J. Vogel
Keyword(s):  
Numerical Experiment ◽  
Solute Transport ◽  
Pore Size ◽  
Water Retention ◽  
Network Models ◽  
Pore Connectivity

The effects of biochar on soil physical properties and winter wheat growth

2012 ◽  
Vol 103 (1) ◽  
pp. 13-18 ◽  
Author(s):  
Rachel C. Devereux ◽  
Craig J. Sturrock ◽  
Sacha J. Mooney
Keyword(s):  
Pore Size ◽  
Bulk Density ◽  
Water Retention ◽  
Average Pore Size ◽  
Water Repellency ◽  
Soil Bulk Density ◽  
Average Pore ◽  
Wheat Growth ◽  
Wetting Ability ◽  
X Ray Computed

ABSTRACTBiochar has been reported to improve soil quality and crop yield; however, less is known about its effects on the physical and, in particular, structural properties of soil. This study examines the potential ability of biochar to improve water retention and crop growth through a pot trial using biochar concentrations of 0%, 1·5%, 2·5% and 5% w/w. X-ray computed tomography was used to measure soil structure via pore size characteristics; this showed that pore size is significantly affected by biochar concentration. Increasing biochar is associated with decreasing average pore size, which we hypothesise would impact heavily on hydraulic performance. At the end of the experiment, average pore size had decreased from 0·07 mm2 in the 0% biochar soil to 0·046 mm2 in the 5% biochar soil. Increased biochar concentration also significantly decreases saturated hydraulic conductivity and soil bulk density. It was also observed that increased biochar significantly decreases soil water repellency. Increased water retention was also observed at low matric potentials, where it was shown that increased biochar is able to retain more water as the soil dried out. The application of biochar had little effect on short-term (<10 weeks) wheat growth, but did improve water retention through a change in soil porosity, pore size, bulk density and wetting ability.

scholarly journals Accounting for evolving pore size distribution in water retention models for compacted clays

2014 ◽  
Vol 39 (7) ◽  
pp. 702-723 ◽  
Author(s):  
Gabriele Della Vecchia ◽  
Anne-Catherine Dieudonné ◽  
Cristina Jommi ◽  
Robert Charlier
Keyword(s):  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Water Retention ◽  
Retention Models ◽  
Compacted Clays

scholarly journals Prediction of soil water retention properties using pore-size distribution and porosity

2013 ◽  
Vol 50 (4) ◽  
pp. 435-450 ◽  
Author(s):  
Christopher T.S. Beckett ◽  
Charles E. Augarde
Keyword(s):  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Soil Water ◽  
Water Retention ◽  
Adsorbed Water ◽  
Retention Data ◽  
Soil Water Retention ◽  
Pore Size Distributions ◽  
Water Retention Properties

Several models have been suggested to link a soil's pore-size distribution to its retention properties. This paper presents a method that builds on previous techniques by incorporating porosity and particles of different sizes, shapes, and separation distances to predict soil water retention properties. Mechanisms are suggested for the determination of both the main drying and wetting paths, which incorporate an adsorbed water phase and retention hysteresis. Predicted results are then compared with measured retention data to validate the model and to provide a foundation for discussing the validity and limitations of using pore-size distributions to predict retention properties.

The Impact of Pore Size and Pore Connectivity on Single-Phase Fluid Flow in Porous Media

2010 ◽  
Vol 13 (3) ◽  
pp. 208-215 ◽  
Author(s):  
Zeyun Jiang ◽  
Kejian Wu ◽  
Gary D. Couples ◽  
Jingsheng Ma
Keyword(s):  
Porous Media ◽  
Fluid Flow ◽  
Pore Size ◽  
Single Phase ◽  
Flow In Porous Media ◽  
Pore Connectivity ◽  
The Impact ◽  
Phase Fluid
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