Physics of Desaturation in Porous Materials

White, Nikolas F.; Duke, Harold R.; Sunada, Daniel K.; Corey, A. T.

doi:10.1061/jrcea4.0000716

Cited by 34 publications

(9 citation statements)

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“…These results are in line with previous findings (Eyo et al, 2020;Zhai et al, 2020). White et al (1970) and Vanapalli et al (1999) suggested that the SWCC can be divided into three stages namely boundary effect, transition, and unsaturated. Combined with the fitting parameters of every stage obtained from the VG model, the hillslope of the transition stage, saturated volumetric water content, air entry value, dehumidification rate, and residual water content of loess can be obtained (Table 2).…”

Section: Effect Of Clps On Soil Water Retentionsupporting

confidence: 93%

“…After 12 weeks, the alfalfa taproots in loess treated with 2.0% CLPs were significantly more developed and thicker than those in untreated loess. These findings suggest that the application of CLPs did not inhibit plant development and (White et al, 1970;Vanapalli et al, 1999). actually promoted plant growth.…”

Section: Effect Of Clps On Plant Growth Characteristicsmentioning

confidence: 76%

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A Cross-Linked Polymer Soil Stabilizer for Hillslope Conservation on the Loess Plateau

et al. 2021

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The soil of the Loess Plateau is highly susceptible to erosion due to its distinct loess structure with poor water stability and disintegrates easily. Previous research has focused on improving soil strength without considering stability and ecological performance. Comprehensive improvements may be achieved by cross-linked polymers (CLPs), but their effect on loess structure remains unclear. In the present study, we investigate CLPs as a new organic soil stabilizer to improve soil aggregate stability. To determine the effect of CLPs on the stabilization of loess, a series of indoor tests was conducted to assess unconfined compressive strength, water stability, soil-water characteristics, and plant height. The stabilization mechanism was analyzed by comparing the microstructure, mineral composition, and features of functional groups of loess before and after treatment. The results showed that, compared with untreated loess, the unconfined compressive strength and anti-disintegration property of treated loess were significantly increased. The water retention capacity was improved, and the germination rate and growth of plants were promoted. Microscopic analysis showed that the use of CLPs did form new minerals in the loess or change the functional groups, rather, CLPs improved the microstructure, reduced the total volume of pores, and increased the degree of soil compaction. Field tests showed that the erosion of loess hillsides was effectively controlled by CLPs. Under the same erosive conditions, the slope surface treated with CLPs was more intact than the untreated slope surface. Our findings provide new strategies regarding the application of CLPs as soil stabilizers to control loess erosion and promote vegetation restoration.

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Section: Effect Of Clps On Soil Water Retentionsupporting

confidence: 93%

Section: Effect Of Clps On Plant Growth Characteristicsmentioning

confidence: 76%

A Cross-Linked Polymer Soil Stabilizer for Hillslope Conservation on the Loess Plateau

et al. 2021

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“…It is possible to extend the above to a conceptual model for the coupled hydro-mechanical behaviour of unsaturated soils. The conceptual model presented below draws heavily on the work of White et al (1970) and divides the soil into the four principle zones illustrated in Figure 7. Zone 3 is further subdivided into two zones of behaviour.…”

Section: Conceptual Modelmentioning

confidence: 99%

Coupled consolidation in unsaturated soils: An alternative approach to deriving the Governing Equations

Tsiampousi

Smith

Potts

2017

Computers and Geotechnics

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The equations governing coupled consolidation in unsaturated soils are known to contain additional parameters when compared to the equations for saturated soils. Nonetheless, the variation of these parameters with suction or degree of saturation is not generally agreed upon. The paper introduces a novel approach to deriving general equations for each of these parameters and their variation, and explains that, for consistency with the constitutive and soil-water retention curve models adopted, these general equations need to be transformed into case-specific expressions. Finally, a conceptual model is presented highlighting how the behaviour of unsaturated soil reflects aspects of its water content

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“…In the above equation, it is difficult to evaluate the physical behavior of fluid flow in porous media from such work when the analysis is restricted to dimensional microscopic flow or neglect the effect of microscopic acceleration or treats simplified model such as capillary flow in small tubes. White et al (1970) studied the physics of de-saturation in porous materials, a theoretical analysis of the relationship between saturation and capillary pressure is developed. A comparison between the theoretical and experimental relationship is also resented.…”

Section: Introductionmentioning

confidence: 99%

Role of river stage in characterization of phreatic line

Kumar

Granthi

2021

WJE

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Purpose The purpose of this study is to understand the basics of interactions of groundwater and surface water, which is needed for effective management of water resources. Design/methodology/approach The experimental setup was framed using curved flume and the straight flume, which simulates the model of river and groundwater storage, respectively. The model set up further consists, downstream, central and upstream sections where 14 observation wells, which are arranged at a measured distance from the canal side. Findings Exit gradient is higher at downstream when the average head differences between canal and river are 31.9 cm and 35.7 cm. Free seepage height is more in the downstream wells than upstream and central wells. At the downstream section, there is a greater chance of instability of the riverbank. Research limitations/implications Results will be used for better planning of hydraulic structural design. Practical implications Results will help in storing the large water and better irrigation planning for the water acute states and locations. Originality/value The originality is own developed physical model and its own first type to understand the basic of interaction and effects.

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Physics of Desaturation in Porous Materials

Cited by 34 publications

References 0 publications

A Cross-Linked Polymer Soil Stabilizer for Hillslope Conservation on the Loess Plateau

A Cross-Linked Polymer Soil Stabilizer for Hillslope Conservation on the Loess Plateau

Coupled consolidation in unsaturated soils: An alternative approach to deriving the Governing Equations

Role of river stage in characterization of phreatic line

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