Modelling capillary rise and soil salinity for shallow saline water table under irrigated and non-irrigated conditions

Jorenush, Mohammad Hadi; Sepaskhah, Ali Reza

doi:10.1016/s0378-3774(02)00176-2

Cited by 77 publications

(42 citation statements)

References 4 publications

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“…The newly reclaimed coastal mudflats, as typical salt-soil, have high salinity, high pH, and macronutrient deficiencies [5]. High salinity of mudflat salt-soil is driven by the strong evaporation demand of the air, shallow salt solution rise to the soil surface through soil capillary in the dry season [6]. In the area rich in freshwater resources, soil salinity reduction is often accomplished through freshwater irrigation [7].…”

Section: Introductionmentioning

confidence: 99%

Sewage Sludge Amendment Combined with Green Manuring to a Coastal Mudflat Salt-Soil in Eastern China: Effects on Soil Physicochemical Properties and Maize Yield

Bai

Zuo

Yan

et al. 2017

International Journal of Agronomy

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Sewage sludge and green manure have become widely used organic amendments to croplands in many regions of the world. However, the amending effect of the combination of sewage sludge with green manuring in reclaimed coastal mudflat salt-soil has been unclear yet. This paper was one of earlier studies to investigate and evaluate the effects of sewage sludge amendment combined with green manuring on selected soil physicochemical properties of the mudflat soil in a rain-fed agroecosystem. The mudflat salt-soil was amended by one-time input of sewage sludge at the rates of 0, 30, 75, 150, and 300 t ha −1 . After green manuring for three consecutive seasons, maize (Zea mays L.) was planted in 2013 and 2014. The results showed that SSA combined with green manuring decreased bulk density, pH, salinity, and exchangeable sodium percentage of the topsoil (0-20 cm soil layer) and increased aggregate stability, cation exchange capacity, and N and P concentration of the topsoil. As a result, the maize yield increased with the increase of SSA rates. Sewage sludge combined with green manuring can be applied in coastal mudflat salt-soil amendment, which provides an innovative way to create arable land resources and safe disposal of sewage sludge.

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Section: Introductionmentioning

confidence: 99%

Sewage Sludge Amendment Combined with Green Manuring to a Coastal Mudflat Salt-Soil in Eastern China: Effects on Soil Physicochemical Properties and Maize Yield

Bai

Zuo

Yan

et al. 2017

International Journal of Agronomy

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“…Despite the above mentioned advantages, long-time capillary upflow may result in soil salinization in the irrigated areas with shallow water tables, if significant salt exists in the groundwater and soil (Silberstein et al, 1999;Salama et al, 1999;Valenza et al, 2000;Jorenush and Sepaskhah, 2003). Fortunately, natural infiltration of excess rainfall in rainy seasons can leach some accumulated salt into the subsoil and the shallow groundwater.…”

Section: Introductionmentioning

confidence: 99%

Water fluxes at a fluctuating water table and groundwater contributions to wheat water use in the lower Yellow River flood plain, China

Yang

Wan

Deng

et al. 2007

Hydrological Processes

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Abstract:Capillary upflow from and deep percolation to a water table may be important in crop water supply in irrigated areas of the lower Yellow River flood plain, north China. These fluxes at the water table and the variations of the capillary upflow in relation to crop evapotranspiration need to be investigated to quantify the effect of a water table on soil water balance and to improve agricultural water management. A large weighing lysimeter was used to determine daily crop evapotranspiration, daily capillary upflow from and daily percolation to a fluctuating water table during a rotation period with wheat growing in a dry season and maize in a rainy season. The water table depth varied in the range 0Ð7-2Ð3 m during the maize growth period and 1Ð6-2Ð4 m during the wheat growth period. Experimental results showed that the capillary upflow and the percolation were significant components of the soil water balance. Three distinctly different phases for the water fluxes at the water table were observed through the rotation period: water downward period, the period of no or small water fluxes, and water upward period. It implied that the temporal pattern of these water fluxes at the water table was intimately associated with the temporal distribution of rainfall through the rotation period. An empirical equation was determined to estimate the capillary upflow in relation to wheat evapotranspiration and root zone soil water content for local irrigation scheduling. Coupled with the FAO-Penman-Monteith equation, the equation offers a fast and low cost solution to assess the effect of capillary upflow from a water table on wheat water use.

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“…Solute movement is driven by diffusion and convection (Bresler 1972, Narasimhan 1998, Smiles et al 1978). Models, formulated simultaneously on Richards' equation and the diffusive and convective solute transport equation, can descript capillary rise and salinization in an unsaturated soil profile (Jorenush et al 2003, Prathapar et al 1992). The current engineering research on water-salt movement mostly lay emphasis on agriculture production and environmental protection (Liu et al 2007, Su et al 2005, Yang et al 2008, and saline soil subgrade protection in seasonal frost region (Liang et al 2011, Liu et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Experimental study on water-salt movement of coastal saline soil

Cai¹,

Ma²

2016

Proceedings of the 2016 5th International Conference on Civil, Architectural and Hydraulic Engineering (ICCAHE 2016)

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KEYWORD: costal saline soil, water-salt movement, column test, controlling measures ABSTRACT: Saline soil water-salt movement results to subgrade diseases like collapsibility, salt expansion and secondary salinization in coastal areas with saline shallow water table. Column tests were carried out to study the regularity of coastal saline soil water-salt movement. Results show that coastal saline soil with a higher level of groundwater salinity has a higher capillary rising height. And both water content and salt content are higher either. Since coastal saline soil is fat clay, the increase of compaction degree may decrease capillary intense rising height, together with its water content and salt content. The findings suggest that controlling measures of coastal saline soil watersalt movement should be considered from desalination, water controlling and structural strengthening.

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Modelling capillary rise and soil salinity for shallow saline water table under irrigated and non-irrigated conditions

Cited by 77 publications

References 4 publications

Sewage Sludge Amendment Combined with Green Manuring to a Coastal Mudflat Salt-Soil in Eastern China: Effects on Soil Physicochemical Properties and Maize Yield

Sewage Sludge Amendment Combined with Green Manuring to a Coastal Mudflat Salt-Soil in Eastern China: Effects on Soil Physicochemical Properties and Maize Yield

Water fluxes at a fluctuating water table and groundwater contributions to wheat water use in the lower Yellow River flood plain, China

Experimental study on water-salt movement of coastal saline soil

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