Prediction of hysteretic soil and water characteristic curve of loess based on multifractal theory and improved physical statistics

Ma, Jianhua; Zeng, Runqiang; Bian, Shiqiang; Meng, Xingmin; Zhang, Zonglin; Khalid, Zainab

doi:10.1016/j.jhydrol.2024.130898

Journal of Hydrology

2024

DOI: 10.1016/j.jhydrol.2024.130898

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Prediction of hysteretic soil and water characteristic curve of loess based on multifractal theory and improved physical statistics

Jianhua Ma,

Runqiang Zeng,

Shiqiang Bian

et al.

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Quantitative experimental study on the apparent contact angle of unsaturated loess and its application in soil–water characteristics curve modeling

Fu,

Xu,

Liao

2024

Vadose Zone Journal

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Advancing and receding water contact angles, often denoted as the maximum and minimum apparent water contact angles, are crucial parameters reflecting a soil's water holding capacity. These parameters play an important role in establishing theoretical soil–water characteristic curves (SWCCs) for unsaturated soils. However, pre‐assuming constant advancing and receding contact angles during soil wetting and drying processes may be erroneous due to their close correlations with the water content and void ratio. To address this research gap, systematic laboratory measurements were conducted on a loess with different void ratios and water contents. Apparent water contact angles were acquired using an axisymmetric drop shape analyzer, enabling a comprehensive dataset. Analysis of variance was employed to assess the statistically significant differences between void ratios and water contents. The results reveal a significant increase in the observed water contact angle as the void ratio decreases and a decrease with increasing water content. Although both the void ratio and water content influence the water contact angle, the latter has a more pronounced effect. The relationship between the receding water contact angle and water content/void ratio is observed to be linear. The identification of this linear relationship offers insights into the fitting of the SWCC for loess across varying void ratios. This study serves to enhance theoretical methodologies, particularly in the adaptation of contact angles, thus facilitating the development of more precise SWCC models.

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Quantitative experimental study on the apparent contact angle of unsaturated loess and its application in soil–water characteristics curve modeling

Fu,

Xu,

Liao

2024

Vadose Zone Journal

View full text Add to dashboard Cite

show abstract

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Prediction of hysteretic soil and water characteristic curve of loess based on multifractal theory and improved physical statistics

Cited by 1 publication

References 68 publications

Quantitative experimental study on the apparent contact angle of unsaturated loess and its application in soil–water characteristics curve modeling

Quantitative experimental study on the apparent contact angle of unsaturated loess and its application in soil–water characteristics curve modeling

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