Effect of Porosity on Soil-Water Retention Curves: Theoretical and Experimental Aspects

Liu, Chang; Tong, Fuguo; Yan, Long; Zhou, Hu; Hao, Shuang

doi:10.1155/2020/6671479

Cited by 7 publications

(4 citation statements)

References 33 publications

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“…More examples of the positive effect of zeolites on soil water retention are presented by Nakhli et al [62] in their excellent review of the subject. Both gravitational and plant available soil water depend on soil macrostructure (large pores range, gravitational water) and soil mesostructure (medium pore range, plant available water) [63]. The slight effect of zeolite on plant available water is most likely connected with its small impact on soil macro-and mesostructure, which can be seen from the porosimetric measurements presented below.…”

Section: Laboratory Soil Studiesmentioning

confidence: 87%

“…In situations where the liquid phase is not agitated, diffusion through this layer may become the rate-limiting step [59]. For column percolation tests, equilibrium is rapidly established at the beginning of a test for many materials in a broad range of particle size distributions and flow velocities [61,62], but mostly cannot be maintained throughout the test [63]. Achievement of equilibrium is important if the results from laboratory leaching tests are to be comparable to field studies [61,64].…”

Section: Mass-transfer Processesmentioning

confidence: 99%

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Measurement of the Environmental Impact of Materials

2023

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Throughout their life cycles-from production, usage, through to disposal-materials and products interact with the environment (water, soil, and air). At the same time, they are exposed to environmental influences and, through their emissions, have an impact on the environment, people, and health. Accelerated experimental testing processes can be used to predict the long-term environmental consequences of innovative products before these actually enter the environment.We are living in a material world. Building materials, geosynthetics, wooden toys, soil, nanomaterials, composites, wastes and more are research subjects examined by the authors of this book. The interactions of materials with the environment are manifold. Therefore, it is important to assess the environmental impact of these interactions. Some answers to how this task can be achieved are given in this Special Issue.

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Section: Laboratory Soil Studiesmentioning

confidence: 87%

Section: Mass-transfer Processesmentioning

confidence: 99%

Measurement of the Environmental Impact of Materials

2023

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“…Various factors, including soil texture, bulk density (BD), soil organic carbon (SOC), soil pore-size distribution, and vegetation coverage, have been identified as influencing soil water retention/content [58][59][60][61]. These factors interact with each other and play important roles in determining the ability of soil to hold and release water.…”

Section: Controls Of Differences In Soil Water Retention/content For ...mentioning

confidence: 99%

Investigating Soil Water Retention and Water Content in Retrogressive Thaw Slumps in the Qinghai-Tibet Plateau, China

Sun,

Wang,

Xing

et al. 2024

Water

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Retrogressive thaw slumps (RTSs) are becoming more common on the Qinghai-Tibet Plateau as permafrost thaws, but the hydraulic properties of thaw slumps have not been extensively studied. To fill this knowledge gap, we used the “space-for-time substitution method” to differentiate three stages of RTSs: original grassland, collapsing, and collapsed. Our study included on-site investigations, measurements in the laboratory, and measured and simulated analyses of soil water retention curves and estimated hydrological properties. Our findings show that the measurements and simulated analyses of soil water retention were highly consistent across RTSs, indicating the accuracy of the Van Genuchten model in reproducing soil hydraulic parameters for different stages of RTSs. The original grassland stage had the highest soil water retention and content due to its high soil organic carbon (SOC) content and fine-textured micropores. In contrast, the collapsed stage had higher soil water retention and content compared to the collapsing stage, primarily due to increased proportions of soil micropores, SOC content, and lower bulk density (BD). From original grassland stage to collapsed stage, there were significant changes on the structure of each RTS site, which resulted in a decrease in SOC content and an increase in BD in general. However, the absence of soil structure and compaction led to the subsequent accumulation of organic matter, increasing SOC content. Changes in field capacity, permanent wilting point, and soil micropore distribution aligned with variations in SOC content and water content. These findings highlight the importance of managing SOC content and water content to mitigate the adverse effects of freeze-thaw cycles on soil structure and stability at different thaw collapse stages of RTSs. Effective management strategies may include incorporating organic matter, reducing soil compaction, and maintaining optimal water content. Further research is needed to determine the most suitable management practices for different soil types and environmental conditions.

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“…Various factors, including soil texture, bulk density (BD), soil organic matter (SOM), soil poresize distribution, and vegetation coverage, have been identified as influencing soil water retention and content [56][57][58][59]. These factors interact with each other and play important roles in determining the ability of soil to hold and release water.…”

Section: Controls Of Differences In Soil Water Retention and Water Co...mentioning

confidence: 99%

Investigating Soil Water Retention and Hydrological Properties in Retrogressive Thaw Slumps in the Qinghai-Tibet Plateau, China

Sun,

Wang,

Xing

et al. 2023

Preprint

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Retrogressive thaw slumps (RTSs) are becoming more common on the Qinghai-Tibet Plateau as permafrost thaws, but the hydraulic characteristics of these slumps have not been extensively studied. To fill this knowledge gap, we used the ''space-for-time substitution method'' to differentiate three stages of RTSs: original grassland, collapsing, and collapsed. Our study included on-site investigations, measurements, and simulated analyses of soil water characteristics, environmental factors, and hydrological properties. Our findings show that the measurements and simulated analyses of soil water characteristics were highly consistent across RTSs, indicating the accuracy of the V-G model in reproducing soil hydraulic parameters for different stages of RTSs. The original grassland stage had the highest soil water retention and content due to its high SOM content and fine-textured micropores. In contrast, the collapsed stage had higher soil water retention and content compared to the collapsing stage, primarily due to increased proportions of soil micropores, SOM content, and lower bulk density (BD). Freeze-thaw cycles had a significant impact on the soil texture and structure of RTSs, resulting in a decrease in SOM content and an increase in BD. However, the absence of soil structure and compaction led to the subsequent accumulation of organic matter, increasing SOM content. Changes in field capacity (FC), permanent wilting point (PWP), and soil micropore distribution aligned with variations in SOM content and water content.These findings highlight the importance of managing SOM content and water content to mitigate the adverse effects of freeze-thaw cycles on soil structure and stability at different stages of RTSs. Effective management strategies may include incorporating organic matter, reducing soil compaction, and maintaining optimal water content. Further research is needed to determine the most suitable management practices for different soil types and environmental conditions.

show abstract

Effect of Porosity on Soil-Water Retention Curves: Theoretical and Experimental Aspects

Cited by 7 publications

References 33 publications

Measurement of the Environmental Impact of Materials

Measurement of the Environmental Impact of Materials

Investigating Soil Water Retention and Water Content in Retrogressive Thaw Slumps in the Qinghai-Tibet Plateau, China

Investigating Soil Water Retention and Hydrological Properties in Retrogressive Thaw Slumps in the Qinghai-Tibet Plateau, China

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