Capillary rise simulation of saline waters of different concentrations in sandy soils

Jitrapinate, N.

doi:10.14456/kkuenj.2016.12

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…This pattern indicated that after irrigation water with a certain TDS background entered the soil, the soil salt content initially increased. Subsequently, as the irrigation water moved downward, salt accumulated in the surface layer due to intense evaporation and capillary rise of water (Natthawit, 2016), resulting in a periodic process of irrigation leaching and salt accumulation through evaporation. After irrigation with high TDS water, the surface soil water TDS of columns K1-K7 increased by 0.37 to 5.08 times compared to low TDS water irrigation (Fig.…”

Section: Water-salt Transport Patterns and Influencing Factorsmentioning

confidence: 99%

Characteristics of Soil Salinity and Water-Salt Transport in the Vadose Zone of Salt-Impacted Regions with Variable Permeability

Ma,

Ge,

Pang

et al. 2024

Preprint

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Soil salinization poses a significant ecological challenge, emerging as a critical constraint to agricultural development in the arid and semi-arid regions of China, especially in southern Xinjiang. In particular, Yuepuhu County, situated in Kashgar, faces a distinctive issue. Impermeable thin clay layers within the vadose zone impede year-round leaching of salts, significantly impacting the growth of cotton. Through a combination of indoor testing, experiments, and statistical analyses, this study elucidated the varying permeability of soil layers at different depths and explored the forms and accumulation characteristics of soil salts in Yuepuhu County. It unveiled patterns of water and salt movement in soils with variable permeability layers, identifying key influencing factors. The research also proposed an irrigation regime suitable for cultivating vadose zone soils in the local context. The findings revealed a progression of increasing soil complexity and decreasing burial depth of clay layers from northwest to southeast, aligned with the direction of groundwater flow. With increasing depth, a noticeable reduction in soil saturated hydraulic conductivity was observed, indicating significant variability in permeability. Predominantly chloride-sulfate type saline soils in Yuepuhu County contained potassium (K+) and sodium (Na+) as the main cations in surface soils. Salinity strongly correlated with calcium (Ca2+) and magnesium (Mg2+). Chloride (Cl-), sulfate (SO42-), K+, Na+, and bicarbonate (HCO3-) reflected the degree of soil salinization in Yuepuhu County. The clay interlayers in variable permeability zones significantly impeded water and salt movement in the vadose zone. Moving from west to east, thicker and shallower clay interlayers hindered downward water movement, increasing the difficulty of salt leaching. Additionally, the irrigation regime influenced water and salt movement in the vadose zone. Under the same soil structure, flood irrigation with a higher water flux resulted in more significant salt leaching, and lower total dissolved solids (TDS) in irrigation water were more favorable for effective salt leaching. Collectively, our findings provided a theoretical foundation for improving and managing local saline soils, as well as guiding the implementation of rational agricultural irrigation practices.

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Section: Water-salt Transport Patterns and Influencing Factorsmentioning

confidence: 99%

Characteristics of Soil Salinity and Water-Salt Transport in the Vadose Zone of Salt-Impacted Regions with Variable Permeability

Ma,

Ge,

Pang

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

Characteristics of soil salinity and water-salt transport in the vadose zone of salt-impacted regions with variable permeability

Ma,

Ge,

Pang

et al. 2024

Environ Geochem Health

View full text Add to dashboard Cite

Soil salinization poses a significant ecological challenge, emerging as a critical constraint to agricultural development in the arid and semi-arid regions of China, especially in southern Xinjiang. In particular, Yuepuhu County, situated in Kashgar, faces a distinctive issue. Impermeable thin clay layers within the vadose zone impede year-round leaching of salts, significantly impacting the growth of cotton. Through a combination of indoor testing, experiments, and statistical analyses, this study elucidated the varying permeability of soil layers at different depths and explored the forms and accumulation characteristics of soil salts in Yuepuhu County. It unveiled patterns of water and salt movement in soils with variable permeability layers, identifying key influencing factors. The research also proposed an irrigation regime suitable for cultivating vadose zone soils in the local context. The findings revealed a progression of increasing soil complexity and decreasing burial depth of clay layers from northwest to southeast, aligned with the direction of groundwater flow. With increasing depth, a noticeable reduction in soil saturated hydraulic conductivity was observed, indicating significant variability in permeability. Predominantly chloride-sulfate type saline soils in Yuepuhu County contained potassium (K + ) and sodium (Na + ) as the main cations in surface soils. Salinity strongly correlated with calcium (Ca 2+ ) and magnesium (Mg 2+ ). Chloride (Cl − ), sulfate (SO 4 2− ), K + , Na + , and bicarbonate (HCO 3 − ) reflected the degree of soil salinization in Yuepuhu County. The clay interlayers in variable permeability zones significantly impeded water and salt movement in the vadose zone. Moving from west to east, thicker and shallower clay interlayers hindered downward water movement, increasing the difficulty of salt leaching. Additionally, the irrigation regime influenced water and salt movement in the vadose zone. Under the same soil structure, flood irrigation with a higher water flux resulted in more significant salt leaching, and lower total dissolved solids (TDS) in irrigation water were more favorable for effective salt leaching. Collectively, our findings provided a theoretical foundation for improving and managing local saline soils, as well as guiding the implementation of rational agricultural irrigation practices.

show abstract

Capillary rise simulation of saline waters of different concentrations in sandy soils

Cited by 2 publications

References 5 publications

Characteristics of Soil Salinity and Water-Salt Transport in the Vadose Zone of Salt-Impacted Regions with Variable Permeability

Characteristics of Soil Salinity and Water-Salt Transport in the Vadose Zone of Salt-Impacted Regions with Variable Permeability

Characteristics of soil salinity and water-salt transport in the vadose zone of salt-impacted regions with variable permeability

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