Examining the implications of spatial variability of saturated soil hydraulic conductivity on direct surface runoff hydrographs

Santos, Rodrigo César Vasconcelos dos; Vargas, Marcelle Martins; Timm, Luís Carlos; Beskow, Samuel; Siqueira, Tirzah Moreira; Mello, Carlos Rogério de; Soares, Mauricio Fornalski; Moura, Maíra Martim de; Reichardt, Klaus

doi:10.1016/j.catena.2021.105693

Cited by 6 publications

(2 citation statements)

References 39 publications

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“…Large amounts of irrigation can cause a rise in the groundwater table, and salt migration to the topsoil layer through groundwater evaporation can result in soil resalinization after irrigation. The autumn irrigation quota in the Hetao Irrigation District is generally very high, and the hydraulic conductivity of the saline-alkaline soil is poor [41,42]. Additionally, subsurface drainage can drain shallow groundwater out of farmland, thus accelerating the rate of decline in the groundwater level after autumn irrigation.…”

Section: Effect Of Different Treatments On Soil Watermentioning

confidence: 99%

Effect of Autumn Irrigation on Salt Leaching under Subsurface Drainage in an Arid Irrigation District

Liu

Huang

et al. 2023

Water

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Non-growing season irrigation and farmland subsurface drainage play a crucial role in salt leaching and salinization control in arid irrigation areas. This study aimed to investigate the reduction of autumn irrigation quotas and drainage discharge while maintaining soil moisture retention and reducing soil salinization. Field experiments were conducted with different autumn irrigation quotas (160 mm for SD1, 180 mm for SD2, and 200 mm for SD3) combined with subsurface drainage (1.5 m drain depth and 45 m spacing). A control treatment (referred to as CK) without subsurface drainage received 200 mm of irrigation. The results showed that, after 31 days of autumn irrigation, the groundwater depth in all three subsurface drainage plots stabilized to 1.5 m, with the CK being 0.2–0.3 m shallower compared to the SD plots. The mean soil water content in the 0–150 cm soil layer of the SD1, SD2, SD3, and CK after autumn irrigation was 0.36, 0.39, 0.41, and 0.42 cm3cm−3, respectively. The combination of autumn irrigation and subsurface drainage significantly reduced the soil salt content. The mean desalination rates in the root zone (0–60 cm) soil layer were 57.5%, 53.7%, 51.9%, and 45.1% for the SD3, SD2, CK, and SD1, respectively. The mean desalination rate of 60–150 cm was not significantly different between the SD2 and SD3 (p > 0.05), and both were significantly higher than that of the SD1 and CK (p < 0.05). The drainage discharge was 31, 36, and 40 mm in the SD1, SD2 and SD3, respectively. The amount of salt discharge through the drain pipe increased with increasing irrigation quota, which was 1.22 t/ha, 1.41 t/ha, and 1.50 t/ha for the SD1, SD2, and SD3, respectively. Subsurface drainage is an effective way to prevent salt accumulation in the soil, and an autumn irrigation quota of 180 mm is recommended for leaching of salinity in the Hetao Irrigation District. These findings provide valuable insights into optimizing irrigation practices and managing soil salinization in arid regions.

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Section: Effect Of Different Treatments On Soil Watermentioning

confidence: 99%

Effect of Autumn Irrigation on Salt Leaching under Subsurface Drainage in an Arid Irrigation District

Liu

Huang

et al. 2023

Water

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“…Saturated hydraulic conductivity K sat is the basic and the most important hydraulic property of the porous medium essential for modeling and designing variety of structures and systems that are based on the interaction between water and porous media. In the field of contaminant transport and agronomy K sat is used for water‐solute transport and crop growth models (e.g., Clemente et al., 1994; Randelovic et al., 2016; Smith et al., 1995; Stanić et al., 2017; van Dam et al., 1997), while in hydrology it is used for different kinds of rainfall‐runoff models (dos Santos et al., 2021; Sheikh et al., 2010). It is also the key parameter for designing irrigation and drainage systems, wells, infiltration fields (Ellafi et al., 2021; Islam et al., 2017; Zhuang et al., 2022), etc., but also variety of Nature Based Solutions (green roofs, biofilters, constructed wetlands, etc.)…”

Section: Introductionmentioning

confidence: 99%

A Novel Semi‐Analytical (Inertial) Solution for Determining Permeability of Highly Pervious Porous Materials Using the Two‐Reservoir Laboratory Setup

Stanić

Govedarica

Jaćimović

et al. 2023

Water Resources Research

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Two conventional experimental procedures for determination of the water permeability of saturated porous medium are the constant and the falling head permeability tests. The first one is more applicable on more permeable materials where the outflow from the sample is measured at variety of constant water heads, while the second one is more convenient for low permeable materials, utilizing the continuous measurements of the water head falling due to filtration through the saturated sample. However, neither of the two is useful for materials of high permeability and large cross‐sectional area. The constant head permeability test faces technical issues since a significant and continuous water discharge is required, while the falling head permeability test has limitations due to neglection of the Forchheimer's high‐velocity flow through the sample, but also the influence of inertia on the fluid mass. Here we proposed an approach for determination of the water permeability of saturated porous medium based on the agreement between the measured water level change in two connected reservoirs containing a porous sample and the new semi‐analytical expression describing that change by accounting for the mentioned theoretical deficiencies. This efficient approach has been tested on four pervious paver samples, and results showed satisfactory agreement with the constant head permeability data. It has been also confirmed the proposed semi‐analytical solution is more accurate than the falling head permeability approach in case of highly pervious materials, while for low permeable materials it reduces to the conventional approach.

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Spatial uncertainty analysis of the saturated soil hydraulic conductivity in a subtropical watershed

et al. 2021

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Examining the implications of spatial variability of saturated soil hydraulic conductivity on direct surface runoff hydrographs

Cited by 6 publications

References 39 publications

Effect of Autumn Irrigation on Salt Leaching under Subsurface Drainage in an Arid Irrigation District

Effect of Autumn Irrigation on Salt Leaching under Subsurface Drainage in an Arid Irrigation District

A Novel Semi‐Analytical (Inertial) Solution for Determining Permeability of Highly Pervious Porous Materials Using the Two‐Reservoir Laboratory Setup

Spatial uncertainty analysis of the saturated soil hydraulic conductivity in a subtropical watershed

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