Soil and irrigation heterogeneity effects on drainage amount and concentration in lysimeters: A numerical study

Raij, Iael; Ben‐Gal, Alon; Lazarovitch, Naftali

doi:10.1016/j.agwat.2017.09.012

Cited by 12 publications

(5 citation statements)

References 31 publications

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“…2). The drainage amount allows estimation of crop evapotranspiration, while the drainage EC measurement enables calculation of actual LF (Raij et al, 2018). The use of such lysimeter data has been attractive for decision-making purposes for hydroponics and in greenhouses using water recycling.…”

Section: Soil Salinity Measurementsmentioning

confidence: 99%

Critical knowledge gaps and research priorities in global soil salinity

Hopmans

Qureshi

Kisekka

et al. 2021

Advances in Agronomy

228

105

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Section: Soil Salinity Measurementsmentioning

confidence: 99%

Critical knowledge gaps and research priorities in global soil salinity

Hopmans

Qureshi

Kisekka

et al. 2021

Advances in Agronomy

228

105

View full text Add to dashboard Cite

“…Weighable (Lazarovitch et al, 2006; Marek et al, 2006; Bryla et al, 2010; Tripler et al, 2012; Evett et al, 2015) and drainage (Duncan et al, 2016; Raij et al, 2018) lysimeters are widely used to determine crop water consumption and irrigation scheduling. When using finite‐depth lysimeters to study processes affected by the water regimes, care should be taken in interpreting the measurements, especially when inferring the expected behavior under natural, free‐drainage field conditions from the lysimeter measurements (Abdou and Flury, 2004; Groh et al, 2016).…”

Section: Illustrative Examples and Discussionmentioning

confidence: 99%

Steady Water Flow with Interacting Point Source–Point Sink–Water Table in a Cylindrical Soil Domain

Friedman

Gamliel

2019

Vadose Zone Journal

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Core Ideas Simultaneous root water uptake from a surface emitter and from groundwater is evaluated. The source–sink–water table problem is decoupled into source–sink and sink–water table problems. Water uptake from the surface emitter is larger in the presence of a shallow water table. Water uptake from a shallow water table is smaller if applying supplementary irrigation. A previously derived analytical solution to the quasi‐linear form of the water flow equation is used to analyze (i) steady, coupled plant water uptake from a surface water emitter in a confined cylindrical soil domain with a non‐evaporating surface in the presence of a shallow water table, and (ii) water uptake from only the water table in the absence of a surface emitter. Illustrative examples serve to analyze and discuss water‐uptake rates of a subsurface, spherical, conceived root zone and the complex water‐flow patterns occurring in either natural fields with shallow groundwater or artificial lysimeters. The coupled source–sink–water table model is also used to illustrate the dependence of the contributions of surface emitter and water table to the overall water‐uptake rate on capillary length and hydraulic conductivity of the saturated soil, the depth of the water table and its prescribed pressure head, the depth and size of the root zone, and the radius of the confined cylinder, representing the effect of neighboring plants and emitters. The proposed methodology can be used to evaluate the effects of these factors on the potential utilization of shallow groundwater, as well as in cases with a supplementary drip irrigation system, and to support design decisions concerning the distance between emitters (and between plants) and the irrigation rates required to complement plant water uptake from groundwater.

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“…To achieve that, a properly calibration of the lysimeters and a representative surrounding field in situ provide small measurements errors. The accuracy of water measured depends on the representativeness of the lysimeter in comparison to the field, the similarity of the plants inside and outside of the lysimeter and the influence of edge effects, boundary conditions, soil properties, fetch and lysimeter surface area [16]. Recently, the development of the load cells and datalogger technology allows one to obtain high-precision weighing lysimeters [17,18].…”

Section: Introductionmentioning

confidence: 99%

Removable Weighing Lysimeter for Use in Horticultural Crops

et al. 2020

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Water resources management is a priority issue in agriculture, especially in areas with water supply problems. Recently, one of the most widespread technologies for measuring crop water requirements are weighing lysimeters. Nevertheless, this type of lysimeters are of large dimensions and require a civil work for their installation. In this article, we present a weighing lysimeter prototype (1000 × 600 mm and 350 mm depth) designed to be used in agricultural farming of horticultural crops. We described the design details that includes ease of assembly, carriage and minimum soil alteration. Structural design results and construction process are also provided showing their performance under different tractors scenarios. The measurements accuracy results show the outcomes of the prototype after being tested. Finally, we discuss our design and measurements results by comparing them with other weighing lysimeters. In comparison, the prototype designed is an accurate and reliable device which reduces the surface and depth of the current weighing lysimeters.

show abstract

Soil and irrigation heterogeneity effects on drainage amount and concentration in lysimeters: A numerical study

Cited by 12 publications

References 31 publications

Critical knowledge gaps and research priorities in global soil salinity

Critical knowledge gaps and research priorities in global soil salinity

Steady Water Flow with Interacting Point Source–Point Sink–Water Table in a Cylindrical Soil Domain

Removable Weighing Lysimeter for Use in Horticultural Crops

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