Effect of freeze–thaw process on heat transfer and water migration between soil water and groundwater

Wu, Tingting; Li, Han; Lyu, Hang

doi:10.1016/j.jhydrol.2022.128987

Cited by 24 publications

(8 citation statements)

References 45 publications

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“…The freezing process caused some of the liquid water to condense into ice crystals as the upper soil temperature decreased, resulting in upward migration of phreatic water to soil water by the soil water potential gradient (Wu et al, 2023). As mediums of energy and water transfer, soil porosity and specific surface area both affected the migration of water and energy (Watanabe and Mizoguchi, 2002).…”

Section: Transformation Between Phreatic Water and Soil Watermentioning

confidence: 99%

“…The Q bh was positive value and indicated that the groundwater was in a negative balance. Most of the water that migrated upward during the freezing period was recharge to the groundwater during the thawing period, and the remaining part of the water was stored in the sand column, which led to an increase in the water content of the sand column (Wu et al, 2023). The positive value of Q bh increased with the increase of interlayer position.…”

Section: Transformation Between Phreatic Water and Soil Watermentioning

confidence: 99%

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Effect of the interlayer on soil temperature and the transformation between phreatic water and soil water under laboratory freeze-thaw action

et al. 2023

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To reveal the effect of interlayer on the temperature of freeze-thaw soil and the transformation between phreatic water and soil water in shallow groundwater areas, a freeze-thaw test was conducted with a groundwater table depth of 0.5 m under laboratory freeze-thaw action. The soil temperature and the transformation between phreatic water and soil water of sand columns under constant freezing temperature at −20°C lasted for 20 days, and the thawing process lasted for 15 days were monitored. The interlayers with a particle size of 0.1–0.5 mm (d50 = 0.3 mm) and a thickness of 5 cm were set at 5, 15, 20, and 25 cm away from the surface and these sand columns were marked as D5, D15, D20, and D25, which were compared with a homogeneous sand column (Ch) with a particle size of 0.5–1.5 mm (d50 = 1.0 mm). The results showed that the fine particle interlayer had thermal insulation on the soil profile and that it effectively inhibited upward migration of phreatic water to soil water during the freezing process. A sand column that had a near-surface interlayer had a better thermal insulation, a stronger inhibition effect on upward migration amount of phreatic water to soil water (UMA) and a larger cumulative downward movement amount of soil water to phreatic water (DMA). The cumulative UMA of D5, D15, D20, and D25 was 61%–84% of Ch during the freezing stage, and the cumulative DMA of D5, D15, D20, and D25 was 29%–57% of Ch during the thawing stage. The inefficient loss of groundwater increased exponentially with the depth of interlayer, the sand column with an interlayer that was farther away from the surface consumed more groundwater and stored more water in the unsaturated zone, and its DMA reached almost zero earlier. These research results were significant for the scientific evaluation of water resources in shallow groundwater areas.

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Section: Transformation Between Phreatic Water and Soil Watermentioning

confidence: 99%

Section: Transformation Between Phreatic Water and Soil Watermentioning

confidence: 99%

Effect of the interlayer on soil temperature and the transformation between phreatic water and soil water under laboratory freeze-thaw action

et al. 2023

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“…It aids in estimating water movement through the vadose zone, a critical factor for groundwater recharge and the sustainability of water supply. (Wu et al, 2023; Xu & Singh, 1998) Heat conduction studies in soil water layers are relevant to agriculture. Farmers can make informed decisions about irrigation scheduling and water conservation based on soil temperature and heat flux data.…”

Section: Introductionmentioning

confidence: 99%

Thermal conductivity in a vadose zone: A novel spectral solution and application by the implication of significant coherence of thermal condition in the shallow soil water layer

Shih

2024

Hydrological Processes

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In the context of the heterogeneity in the unsaturated or vadose zone, accurately representing the analytical mechanisms and in‐situ water content within the soil layer poses a significant challenge. Particularly in shallow layers, thermal conditions exhibit rapid changes in response to evolving surface temperatures. This study proposes a hypothesis suggesting that the in situ heat mechanism may notably impact the soil water layer. The research introduces an innovative approach to theoretically uncover thermal conditions, including soil temperature, soil temperature gradients, and heat flux, within the shallow Quaternary gravel layer at various depths through spectral analysis of temporal observations. The study presents a stochastic inverse solution to estimate thermal conductivity by leveraging spectral analysis of soil heat flux and temperature gradients. The findings reveal that thermal conditions exhibit the most prominent periodic fluctuations during the diurnal process over a 24‐hour cycle. The soil temperature gradients and heat flux measurements at depths of 0.1, 0.3, 0.6, and 1.2 m demonstrate their ability to capture changes in soil temperature and air temperature to a certain extent within the frequency domain. Furthermore, the analysis highlights the intrinsic uncertainty and sensitivity of estimating thermal conductivity in heterogeneous soil environments. The wide variability observed in thermal conductivity values, coupled with their dependence on soil type and environmental conditions, underscores the need for careful consideration of these factors in future studies and modeling efforts. Applying the derived inverse spectral solution allows for determining thermal conductivity throughout the soil‐water system across depths ranging from 0.1 to 1.2 m. As a result, this research demonstrates the feasibility and practicality of assessing the thermal conductivity of the soil layer in conjunction with heat flux and temperature gradients through spectral analysis.

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“…The freeze-thaw cycle of soil is an important physical change process in the soil, which affects the hydrothermal characteristics of soil and the exchange of heat and water between earth and air, and then affects the hydrothermal process on the land surface, and is an important part of the water cycle [1][2][3]. Research on the freeze-thaw cycle of soil is of great significance for developing plateau water resources, agricultural irrigation, engineering construction, environmental protection, and other practical issues [4][5][6]. The Qinghai-Tibet Plateau spans about 13 latitudes in the north and south, the subtropical tropics in the south, the middle latitudes in the north, and 31 longitudes from east to west.…”

Section: Introductionmentioning

confidence: 99%

“…In contrast with the freeze-thaw cycle of alpine meadow soil, it can further provide suggestions for local ecological protection and restoration. We selected the soil profile of the alpine grassland in the Yellow River Source from 2022 to 2023 and combined with in situ near-earth meteorological observation data, analyzed the freeze-thaw process and the changes in the distribution of water and heat to understand the freeze-thaw cycle process of soil in the alpine grassland in this region [5,25]. It provides theoretical support for further understanding the freeze-thaw water-heat cycle mechanism and its impact on the ecosystem.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Soil Moisture and Heat Change during Freeze–Thaw Process in the Alpine Grassland of Duogerong Basin in the Source of the Yellow River

Li,

Zhang,

Chen

et al. 2024

Sustainability

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To deeply understand the characteristics of soil freeze–thaw water–heat change in the alpine grassland in the Duogerong Basin of the Yellow River source, the soil water–heat profile change monitoring was carried out based on the field monitoring station in the Duogerong Basin of the Yellow River source. By analyzing the comprehensive monitoring data from September 2022 to September 2023, the characteristics of the soil temperature and water content changes in the freeze–thaw cycle of the alpine grassland in the Duogerong Basin at the source of the Yellow River were explored. The results showed that the temperature and water content of each layer of the soil profile changed periodically, and the range of change was negatively correlated with the depth. The annual freeze–thaw process at the observation site is divided into five stages: 31 October to 3 November is the short initial freezing period, 4 November to 18 April is the stable freezing period, 19 April to 26 April is the early ablation period, 27 April to 30 April is the late ablation period, and 1 May to 30 October is the complete ablation period. The maximum soil freezing depth during the observation period was about 250 cm. Soil temperature and moisture content change affect each other; soil water is essential in heat transfer, and the two correlate well. The research results provide theoretical support for further understanding the characteristics of soil hydrothermal changes during the freeze–thaw process in the alpine grassland permafrost area at the source of the Yellow River.

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Effect of freeze–thaw process on heat transfer and water migration between soil water and groundwater

Cited by 24 publications

References 45 publications

Effect of the interlayer on soil temperature and the transformation between phreatic water and soil water under laboratory freeze-thaw action

Effect of the interlayer on soil temperature and the transformation between phreatic water and soil water under laboratory freeze-thaw action

Thermal conductivity in a vadose zone: A novel spectral solution and application by the implication of significant coherence of thermal condition in the shallow soil water layer

Characteristics of Soil Moisture and Heat Change during Freeze–Thaw Process in the Alpine Grassland of Duogerong Basin in the Source of the Yellow River

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