Impact of Simulated Irrigation with Treated Wastewater and Saline-Sodic Solutions on Soil Hydraulic Conductivity, Pores Distribution and Fractal Dimension

Shang, Fangze; Ren, Shumei; Zou, Tian; Yang, Peiling; Sun, Nuan

doi:10.1007/978-3-642-54344-9_58

Cited by 4 publications

(2 citation statements)

References 27 publications

(22 reference statements)

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“…As soil moisture increased and oxygen content decreased, the dissolution of CaCO3 and anaerobic respiration in the soil resulted in an elevated HCO3 − content. Groundwater evaporation has a relatively minor impact on HCO3 − in the soil [49,50]. Furthermore, in the absence of groundwater depth, the total soil salt content is primarily related to Ca 2+ , Mg 2+ , and NO3 − .…”

Section: The Relationship Between Surface Salinity and Groundwatermentioning

confidence: 99%

The Influence of Shallow Groundwater on the Physicochemical Properties of Field Soil, Crop Yield, and Groundwater

Li,

et al. 2024

Agriculture

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The depth of shallow groundwater significantly influences crop growth and yield by altering the physicochemical properties of farmland soil profiles. Concurrently, shallow groundwater is subject to various changes, and it remains unclear how alterations in shallow groundwater depth within field soil impact soil physicochemical properties, crop yields, and the overall dynamics of groundwater transformations. To address these uncertainties, this study utilized a sample plot equipped with a volume lysimeter and implemented four distinct groundwater depths as treatment conditions: G0 (no groundwater depth), G1 (a groundwater depth of 40 cm), G2 (a groundwater depth of 70 cm), G3 (a groundwater depth of 110 cm), and G4 (a groundwater depth of 150 cm). This study was carried out on a weekly basis to monitor fluctuations in ion content in shallow groundwater and soil moisture after the summer maize harvest, and special attention was afforded to non-irrigation conditions. This study also scrutinized the distribution of salt and nutrients in soil profiles and assessed changes in summer maize yield. Very interesting findings were obtained by conducting the study. Firstly, the shallower the groundwater depth, the higher the water and salt content of the soil surface. Small, frequent rainfall events (precipitation ≤ 25 mm) facilitated the effective removal of salt from the soil surface. Despite increased rainfall contributing to salt ion dilution in groundwater, the risk of soil surface salinization increased at the surface level. Secondly, a linear relationship existed between groundwater depth and surface soil moisture and salt content. With every 10 cm increase in groundwater depth, the surface soil moisture and salt content decreased by 0.56% and 0.06 g/kg, respectively. Soil nutrients tended to accumulate in the surface layer, with nutrient content increasing with depth. However, C/N was not notably affected by groundwater depth. Thirdly, Na+ and K+ consistently dominated the soil surface. As soil salinity increased, the prevalence of Cl− and SO42− increased, with the rate of SO42− increase surpassing that of chlorine. HCO3− altered by rainfall served as an indicator of soil alkalization characteristics, while Na+ and K+ in soil, along with Cl− and SO42− derived from groundwater, represented soil salt composition and salinization trends. Ultimately, under the conditions of this study, the most favorable groundwater depth for the growth of summer maize was determined to be 1.1 m. Analyzing the impact of different shallow groundwater depths on the physicochemical properties of farmland soil enhances our understanding of the mechanisms of interaction between groundwater and soil in agricultural ecosystems. This knowledge is instrumental in significantly improving the soil environment, thereby ensuring optimal crop yields.

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Section: The Relationship Between Surface Salinity and Groundwatermentioning

confidence: 99%

The Influence of Shallow Groundwater on the Physicochemical Properties of Field Soil, Crop Yield, and Groundwater

Li,

et al. 2024

Agriculture

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“…However, reclaimed water can be seen as a coexistence system and many researchers studied the specific effects of reclaimed water irrigation from different aspects. C and N in reclaimed water have important effects on soil microorganisms [4], K + , Ca 2+ , Na + and Mg 2+ in reclaimed water may cause soil salinity and the change of soil hydraulic conductivity [5][6], suspended solid particles and colloid in reclaimed water may also clog soil pores.…”

Section: Introductionmentioning

confidence: 99%

Effects of Reclaimed Water and C and N on Breakthrough Curves in Sandy Soil and Loam

Shang

Ren

Yan

et al. 2015

Computer and Computing Technologies in Agriculture VIII

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Long-term irrigation with reclaimed water may change soil physical properties and solute transport rate due to C and N in reclaimed water and the particularity of reclaimed water. Ordinary water, reclaimed water and mixed water which added C and N into reclaimed water were used as background water, then potassium bromide was added to background water and mixed them into three kinds of solutions whose bromide concentrations were all 0.5 mol/L, then soil column breakthrough experiments were conducted. The results showed that bacteria quantity increased both in sandy soil and loam after soil column experiments, and bacteria quantity in sandy soil and loam were all in the following descending order: breakthrough solution using mixed water as background water, breakthrough solution using reclaimed water as background water, and breakthrough solution using ordinary water as background water. However, fungi quantity had no significant difference. Cumulative infiltration in sandy soil and loam can be properly described by power function and logarithm function, respectively. The amount of cumulative infiltration in sandy soil and loam in the same infiltration time were all showed a descending order as: breakthrough solution using ordinary water as background water, breakthrough solution using reclaimed water as background water, and breakthrough solution using mixed water as background water. Breakthrough curves can be well described by CXTFIT 2.1 code, it can be seen from the values of V and D that reclaimed water and the addition of C and N made solute transport more difficult in soils and increased diffusion coefficient, and these impacts were greater on loam than sandy soil. Reclaimed water and the added C and N increased soil bacteria, complicated soil pore system, and decreased soil hydraulic conductivity.

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Inclusion of fractal dimension in machine learning models improves the prediction accuracy of hydraulic conductivity

Sarkar,

Maity,

Ray

et al. 2024

Stoch Environ Res Risk Assess

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Impact of Simulated Irrigation with Treated Wastewater and Saline-Sodic Solutions on Soil Hydraulic Conductivity, Pores Distribution and Fractal Dimension

Cited by 4 publications

References 27 publications

The Influence of Shallow Groundwater on the Physicochemical Properties of Field Soil, Crop Yield, and Groundwater

The Influence of Shallow Groundwater on the Physicochemical Properties of Field Soil, Crop Yield, and Groundwater

Effects of Reclaimed Water and C and N on Breakthrough Curves in Sandy Soil and Loam

Inclusion of fractal dimension in machine learning models improves the prediction accuracy of hydraulic conductivity

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