Soil moisture response to water infiltration in a 1-D slope soil column model

Wang, Fawu; Dai, Zili; Takahashi, I.; Tanida, Yuta

doi:10.1016/j.enggeo.2020.105482

Cited by 16 publications

(4 citation statements)

References 31 publications

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“…To reduce the wall effect, the inside of the column was coated with petroleum jelly. The speci cation of the plexiglass soil column was designed by referring to many references and combining with the parameters used in the literature [45][46][47]. Markov bottle was used for continuous water supply with a constant water head of 5 cm, and the in ltration source was distilled water.…”

Section: Soil Column Simulation Experimentsmentioning

confidence: 99%

Response of biochar-amended clayey soils to water infiltration

Li,

Shen,

2024

Preprint

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Biochar is an effective clayey raw soils improver. The difference of the amount of biochar added will cause the difference of soil water infiltration. The effects of mass addition ratios of five types of biochar (B0, B5, B10, B15 and B20) on the migration distance of soil wet front, cumulative infiltration and water holding capacity were studied through laboratory soil column simulation experiments. The soil water infiltration process was simulated as well with R2of 0.992, using Philip model, Horton model and Kostiakov model, respectively. The results demonstrate that the initial infiltration rate, stable infiltration rate and cumulative infiltration volume decrease with the increase of biochar addition and provide a reference of biochar utilization to improve soil hydraulic properties and moisture infiltration performance of clayey raw soils.

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Section: Soil Column Simulation Experimentsmentioning

confidence: 99%

Response of biochar-amended clayey soils to water infiltration

Li,

Shen,

2024

Preprint

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“…In this case, the soil was gradually placed every 150 g, and compacted with a rubber stopper to ensure that the column had a uniform density [21,22]. Besides that, the single ring infiltrometer positioned in the center of the column measured 70 mm diameter and the amounts of water used during the test were identical (15 mL).…”

Section: Laboratory Testsmentioning

confidence: 99%

Estimation of the Hydrodynamic Parameters of Soils Subjected to Water Scarcity: Application of BEST and Introduction of a Specific Methodology

Holanda

Oliveira

Soares

2021

JEAI

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Propose a specific method (Junction Between Arya and Heitman and Haverkamp - JAHH), similar to BEST, to obtain the hydrodynamic parameters of soils in Pernambuco, Brazil. Sample: Department of Civil Engineering, Polytechnic School of Pernambuco – POLI, between March 2019 and February 2021. For this, BEST and JAHH were used to obtain the hydrodynamic characteristics of the collected materials, and the results of both methods were compared with simulations performed in Hydrus-1D. Sorptivity and Ks, acquired using both methods, presented differences reached 68.38% regarding Ks. The characteristic radius of the pores (λm) and capillary length (λc) obtained with BEST are not coherent, and this can be explained because during the evaluation of one sandy soil, λm values were the highest and λc were the lowest, when the opposite was expected. The use of JAHH to estimate soil parameters could generate more coherent estimates than BEST-slope, even though both of them have presented results of the same proportion, such as sorptivity and saturated hydraulic conductivity, for exemple. Therefore, the proposed method presented more pertinent results when compared to BEST regarding the studied soils.

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“…The Chinese Loess Plateau constitutes the largest area of loess deposit globally. The plateau has also experiences serious geo‐disasters and engineering challenges (Xu et al, 2020; Zhou et al, 2002), which have been linked by advanced studies to water (Peng et al, 2015, 2018; Wang et al, 2020). Field investigations have suggested that rainfall infiltration and farmland irrigation have resulted in many slope failures and ground collapses.…”

Section: Introductionmentioning

confidence: 99%

Verification on the mode of moisture transfer in the vadose zone of thick loess

Wang

et al. 2022

Hydrological Processes

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Precipitation is the only source of groundwater recharge in the Chinese loess region. However, rainfall has been the main driver of geological disasters and engineering challenges in China, such as landslides, slope collapse and sinking of foundations. The roles of preferential flow and piston flow in moisture transfer in the thick loess vadose zone remain controversial. This study used a 100‐m thick loess shaft to monitor soil moisture content and soil temperature over 5 years, whereas climate indices were monitored on the Earth surface. The soil water characteristic curves and hydraulic conductivity function of the loess and the palaeosol collected in the profile were measured in a laboratory. The soil profile moisture transfer process was simulated based on the climatic boundary conditions and measured hydraulic parameters. The monitored and simulated results suggest that loess moisture transfer is dominated by piston flow. The thick loess vadose zone above the groundwater level could be divided into two sub‐zones, namely the active and steady zones. The active zone has a thickness of ~7 m and shows a direct response to climate change, with soil moisture content regulated by rainfall infiltration, evaporation and transpiration and soil moisture moving as transient flow. Although preferential flow can move in the active zone along joints, fissures and holes when water accumulates in the lower ground during heavy rainfall, piston flow remains the main mode of water movement. The steady zone has a thickness of <7 m and is above the groundwater level. Soil moisture content and soil temperature in the steady zone show temporal stability and soil moisture moves as a steady flow. Piston flow is the only mode of water movement in the steady zone. Since percolation velocity in the steady zone is estimated to be 73.3 mm/year, 1330 years of rainfall infiltration through the 97.5 m thick vadose zone would be required to recharge groundwater.

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Soil moisture response to water infiltration in a 1-D slope soil column model

Cited by 16 publications

References 31 publications

Response of biochar-amended clayey soils to water infiltration

Response of biochar-amended clayey soils to water infiltration

Estimation of the Hydrodynamic Parameters of Soils Subjected to Water Scarcity: Application of BEST and Introduction of a Specific Methodology

Verification on the mode of moisture transfer in the vadose zone of thick loess

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