Determination of soil hydraulic conductivity with the lattice Boltzmann method and soil thin-section technique

2005 ◽  
Vol 306 (1-4) ◽  
pp. 59-70 ◽  
Author(s):  
Xiaoxian Zhang ◽  
Lynda K. Deeks ◽  
A. Glyn Bengough ◽  
John W. Crawford ◽  
Iain M. Young
Keyword(s):  
Hydraulic Conductivity ◽  
Lattice Boltzmann Method ◽  
Thin Section ◽  
Lattice Boltzmann ◽  
Soil Hydraulic Conductivity ◽  
Section Technique ◽  
Soil Hydraulic ◽  
Boltzmann Method

scholarly journals Determination of Spatial and Temporal Variability of Soil Hydraulic Conductivity for Urban Runoff Modelling

Water ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 941 ◽  
Author(s):  
Matej Radinja ◽  
Ines Vidmar ◽  
Nataša Atanasova ◽  
Matjaž Mikoš ◽  
Mojca Šraj
Keyword(s):  
Hydraulic Conductivity ◽  
Temporal Variability ◽  
Water Repellency ◽  
Infiltration Rate ◽  
Control Measures ◽  
Soil Conditions ◽  
Spatial And Temporal Variability ◽  
Soil Hydraulic Conductivity ◽  
Soil Hydraulic

Soil hydraulic conductivity has a direct influence on infiltration rate, which is of great importance for modelling and design of surface runoff and stormwater control measures. In this study, three measuring techniques for determination of soil hydraulic conductivity were compared in an urban catchment in Ljubljana, Slovenia. Double ring (DRI) and dual head infiltrometer (DHI) were applied to measure saturated hydraulic conductivity (Ks) and mini disk infiltrometer (MDI) was applied to measure unsaturated hydraulic conductivity (K), which was recalculated in Ks in order to compare the results. Results showed significant differences between investigated techniques, namely DHI showed 6.8 times higher values of Ks in comparison to DRI. On the other hand, Ks values obtained by MDI and DRI exhibited the lowest difference. MDI measurements in 12 locations of the small plot pointed to the spatial variability of K ranging between 73%–89% as well as to temporal variability within a single location of 27%–99%. Additionally, a reduction of K caused by the effect of drought-induced water repellency was observed. Moreover, results indicate that hydrological models could be enhanced using different scenarios by employing a range of K values based on soil conditions.

Critical analysis of the field determination of soil hydraulic conductivity functions using the flux-gradient approach

1998 ◽  
Vol 48 (1-2) ◽  
pp. 81-89 ◽  
Author(s):  
K Reichardt ◽  
O Portezan ◽  
P.L Libardi ◽  
O.O.S Bacchi ◽  
S.O Moraes ◽  
...  
Keyword(s):  
Hydraulic Conductivity ◽  
Critical Analysis ◽  
Soil Hydraulic Conductivity ◽  
Flux Gradient ◽  
Soil Hydraulic ◽  
Gradient Approach

scholarly journals Lattice Boltzmann Method for Evaluating Hydraulic Conductivity of Finite Array of Spheres

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Mário A. Camargo ◽  
Paulo C. Facin ◽  
Luiz F. Pires
Keyword(s):  
Hydraulic Conductivity ◽  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Experimental Measurements ◽  
Size Measurement ◽  
Direct Measurements ◽  
The Media ◽  
Sample Structure ◽  
Boltzmann Method ◽  
Theoretical Results

The hydraulic conductivity (K) represents an important hydrophysical parameter in a porous media.Kdirect measurements, usually demand a lot of work, are expensive and time consuming. Factors such as the media spatial variability, sample size, measurement method, and changes in the sample throughout the experiment directly affectKevaluations. One alternative toKmeasurement is computer simulation using the Lattice Boltzmann method (LBM), which can help to minimize problems such as changes in the sample structure during experimental measurements. This work presentsKexperimental and theoretical results (simulated) for three regular finite arrangements of spheres. Experimental measurements were carried out aiming at corroborating the LBM potential to predictKonce the smallest relative deviation between experimental and simulated results was 1.4%.

scholarly journals Unit gradient in internal drainage experiments for the determination of soil hydraulic conductivity

1993 ◽  
Vol 50 (1) ◽  
pp. 151-153 ◽  
Author(s):  
K. Reichardt
Keyword(s):  
Hydraulic Conductivity ◽  
Internal Drainage ◽  
Soil Hydraulic Conductivity ◽  
Potential Gradients ◽  
Soil Hydraulic

It is theoretically shown that unit hydraulic potential gradients cannot occur in homogeneous soils undegoing internal drainage process even though this assumption has been used successfully by several authors of soil hydraulic conductivity methods.

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