Comparative analysis of the apparent saturation hysteresis approach and the domain theory of hysteresis in respect of prediction of scanning curves and air entrapment

Beriozkin, A.; Mualem, Y.

doi:10.1016/j.advwatres.2018.01.016

Cited by 8 publications

(5 citation statements)

References 36 publications

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“…This procedure which results from consecutively applying different experimental techniques to the same soil specimen enables a large number of tests and is not excessively time-consuming, so it is suitable to correctly manage the inherent variability of the considered soils. Indeed, the available hysteretic models in the literature and those implemented in commercial codes were conceived for sedimentary soils and generally validated on artificial samples [5,11,60,64]. Here, the model is calibrated and validated on natural undisturbed soils samples that are characterized by macro-pores, i.e., a meta-stable structure.…”

Section: Introductionmentioning

confidence: 99%

Hydraulic hysteresis of natural pyroclastic soils in partially saturated conditions: experimental investigation and modelling

et al. 2021

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In many geotechnical applications, especially in the study of weather-induced landslides, a reliable soil hydraulic characterization in unsaturated conditions is required. Currently, the experimental techniques that neglect the hydraulic hysteresis represent the greatest limitation to landslide forecasting. In this paper, a procedure to obtain an unsaturated soil hydraulic characterization on natural pyroclastic samples is proposed and verified. The approach enables the evaluation of the soil hydraulic properties along the main drying path and wetting/drying cycles to fully quantify the effects of the hydraulic hysteresis. Pyroclastic soil samples collected at a test site at Mount Faito in the Campania region (southern Italy) were tested. The experimental investigation consisted of a sequence of testing phases: a constant-head hydraulic conductivity test, a forced evaporation test followed by several wetting–drying cycles, and a drying test in a pressure plate apparatus. The hysteretic model proposed by Parker and Lenhard (1987) was adopted to fit the data, while inverse modelling of the forced evaporation tests allowed to derive the model parameters. Therefore, the main drying and wetting branches and the soil response to drying and wetting cycles from any reversal point were reproduced with the model, which suitably described the hysteretic behaviour of the pyroclastic soil under all conditions and along all paths.

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Section: Introductionmentioning

confidence: 99%

Hydraulic hysteresis of natural pyroclastic soils in partially saturated conditions: experimental investigation and modelling

et al. 2021

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“…It is shown that in order to regain the equilibrium state one can add sufficient wetting-drying noise, which causes drifting from the stationary states to the equilibrium one, where ξ ≡ 0. For example, ignoring the 100 small cycles, the rest of the curve reveals the previously phenomenologically dubbed (e.g., see Alsherif et al, 2015;Beriozkin & Mualem, 2018): "first drainage curve" (also known as "primary drying curve"), "first imbibition" (also known as "primary wetting curve") till negative suction, and the following "secondary drainage" (also known as "secondary drying curve", as the final leg of our testing protocol, which does not go return to full saturation S r < 1 at s = 0. This inability to regain full saturation after such drying-wetting-drying cycle has been attributed to "air entrapment"-an obvious synonym for lack of saturation-but we are not aware of clear fundamental explanations to this development besides propositions to use arbitrary curve-fitting protocols.…”

Section: Illustration Of Non-equilibrium Resultsmentioning

confidence: 97%

Hydrodynamics of Non‐Equilibrium Soil Water Retention

Einav

Liu

2023

Water Resources Research

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The connection of air and water pressures to their densities in partially saturated soils is normally expressed by relating suction (air minus water pressures) to the degree of saturation and porosity. These soil water retention relationships, which are known alternatively as capillary pressure-saturation relations, are critical to hydrology, agriculture, geotechnology and petroleum engineering, as they control transport phenomena (

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“…Indeed, our data indicate that during intervals of Ag-MAR flooding and drainage, different θ c can be obtained even for the same location in the soil (data not shown). This is probably related to changes in soil respiration after flooding is initiated (Oikawa et al, 2014;Or et al, 2007) as well as SWRC hysteresis (Beriozkin and Mualem, 2018;Hannes et al, 2016).…”

Section: Model Limitationsmentioning

confidence: 99%

A model for estimating Ag-MAR flooding duration based on crop tolerance, root depth, and soil texture data

Ganot

Dahlke

2021

Agricultural Water Management

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Agricultural Managed Aquifer Recharge (Ag-MAR) is an emerging MAR technique that uses agricultural fields as percolation basins to recharge the underlying aquifers. Ag-MAR can be a beneficial solution for storing excess surface water, however, if not managed properly it can potentially harm the soil and crops planted on the field at the time of recharge, ultimately leading to yield loss. Root zone residence time (RZRT), defined as the duration that the root-zone can remain saturated (or nearly saturated) during Ag-MAR without crop damage, is a key factor in Ag-MAR since extended periods of saturation in the root-zone can damage crops. Here we propose a simple RZRT model for estimating a safe Ag-MAR flooding duration based on hydraulic parameters deduced from soil texture, crop tolerance to saturation, effective root depth, and critical soil water content, which is the point where soil re-aeration occurs during drainage. We tested the model with different hydraulic parameter sets and compared the results to observed data and HYDRUS simulations. Using fitted and unfitted hydraulic parameters the average error of the predicted Ag-MAR flooding duration was less than 5 h, and up to a few days, respectively. Consequently, for crops with low flooding-tolerance, the model should be used with caution, but for more tolerant crops, the model provides reasonable predictions. The model also provides a first approximation of the possible amount of water that can be applied during an Ag-MAR event. Based on the RZRT model, we evaluated the Ag-MAR potential of various crops and effective root depths for each of the USDA soil texture classes. A spreadsheet containing the RZRT model including hydraulic parameters, and crop properties is publicly available and can be used as a learning tool or to estimate Ag-MAR flooding duration for different soils. The proposed model can be easily integrated into Ag-MAR assessment tools.

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Comparative analysis of the apparent saturation hysteresis approach and the domain theory of hysteresis in respect of prediction of scanning curves and air entrapment

Cited by 8 publications

References 36 publications

Hydraulic hysteresis of natural pyroclastic soils in partially saturated conditions: experimental investigation and modelling

Hydraulic hysteresis of natural pyroclastic soils in partially saturated conditions: experimental investigation and modelling

Hydrodynamics of Non‐Equilibrium Soil Water Retention

A model for estimating Ag-MAR flooding duration based on crop tolerance, root depth, and soil texture data

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