Research on the Influence of Water Vapor Diffusion and Evaporation on Water and Heat Transfer in Frozen Soil

Zhang, C. Y.; Zhao, Yandong; Zhang, R. R.; Zheng, Yonglin

doi:10.1134/s1064229318100150

Cited by 8 publications

(2 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…That is, there is an extinction depth of the phreatic evaporation (Gardner & Fireman, 1958). Note that, in some circumstances, the extinction depth can be larger than the height of capillary rise due to vapour flow (Balugani et al, 2017; Miao et al, 2017; Phillips et al, 2017; Zhang et al, 2018). Therefore, the physical mechanism of groundwater depth on soil water movement and surface AE requires in‐depth discussion and analysis.…”

Section: Introductionmentioning

confidence: 99%

Effect of vapour transport on soil evaporation under different soil textures and water table depths in an arid area of Northwest China

Liu

Chen

Wang

et al. 2023

Hydrological Processes

View full text Add to dashboard Cite

In arid area, the liquid water and water vapour states in soil profiles and fluxes at the upper and bottom interfaces are extremely complex due to heterogeneity of soil textures and the driving forces of heat and matrix potential. In this study, we used Hydrus-1D to simultaneously simulate liquid water, water vapour, and heat transport based on the observed datasets of atmosphere, soil and groundwater at three soil profiles in an arid area of northwest China. Based on the comparison of the observed and simulated results at the three soil profiles, we show that there are diurnal vapour entry and outlet fluxes at the dry surface layer of 30 cm in the summer season. The vapour entry and re-evaporation account for about 14% of annual precipitation for the heterogeneity soil profile with a mean groundwater depth of 210 cm. Because of limited soil moisture in this arid area, vapour induced re-evaporation occurs shortly in the early daytime. Moreover, the extent of vapour entry, condensation and reevaporation are strongly dependent on soil properties and water table depth. The deeper water table produces the drier soil surface, allowing more vapour entry, condensation and re-evaporation. Whereas the finer grained soil layers benefit the vapour fixation to produce zero fluxes that substantially inhibit the upward liquid water and vapour fluxes, and thereby reduces soil actual evaporation (AE). The reduced AE correspondingly decreases the capillary effect on phreatic evaporation, given that AE decreases slowly with decline of water table and the large extinct depth of phreatic evaporation for the finer grained soil profiles. The estimated extinct depths are 180 and 200 cm for the soil profiles consisting of silt loam and loamy sand, respectively, much larger than 100 cm of the typical sandy soil profile. Additionally, as water table is comparably higher and lower than the extinct depth, the models neglecting the vapourheat function could, respectively, overestimate and underestimate soil evaporation.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of vapour transport on soil evaporation under different soil textures and water table depths in an arid area of Northwest China

Liu

Chen

Wang

et al. 2023

Hydrological Processes

View full text Add to dashboard Cite

show abstract

“…The sensor main board collected data and controlled each layer's sensor by the connecting cables. To reduce the overall sensor power and avoid electromagnetic interference between the moisture sensors, the sensor board adopted a time-sharing power supply mode to supply the moisture sensor and temperature acquisition board [41]. Before using the sensor, it was necessary to use the specified tool to bury a PVC tube at the test point.…”

Section: A Soil Freezing and Thawing Sensor Structurementioning

confidence: 99%

Untitled

View full text Add to dashboard Cite

Isothermal diffusion of water vapor in unsaturated soils based on Fick’s second law

Liu

Mao

Zhang

et al. 2020

J. Cent. South Univ.

View full text Add to dashboard Cite

Research on the Influence of Water Vapor Diffusion and Evaporation on Water and Heat Transfer in Frozen Soil

Cited by 8 publications

References 27 publications

Effect of vapour transport on soil evaporation under different soil textures and water table depths in an arid area of Northwest China

Effect of vapour transport on soil evaporation under different soil textures and water table depths in an arid area of Northwest China

Untitled

Isothermal diffusion of water vapor in unsaturated soils based on Fick’s second law

Contact Info

Product

Resources

About