The Influence of a Water Absorbing Geocomposite on Soil Water Retention and Soil Matric Potential

Śpitalniak, Michał; Lejcuś, Krzysztof; Dąbrowska, Jolanta; Garlikowski, Daniel; Bogacz, Adam

doi:10.3390/w11081731

Cited by 18 publications

(15 citation statements)

References 90 publications

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“…Most soil conditioners used in order to retain water are of organic origin i.e., clay minerals like kaolinite, montmorillonite, mica, bentonite, zeolite and attapulgite [ 7 , 8 ]. Crystalline swelling of clay minerals is mainly associated with unsaturated conditions, where water potential is controlled by partial vapor pressure, but it may also occur under saturated conditions, where the liquid water potential is controlled by high osmotic suction [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

The Characteristics of Swelling Pressure for Superabsorbent Polymer and Soil Mixtures

et al. 2020

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Superabsorbent polymers (SAPs) are used in agriculture and environmental engineering to increase soil water retention. Under such conditions, the swelling pressure of the SAP in soil affects water absorption by SAP, and soil structure. The paper presents the results of swelling pressure of three cross-linked copolymers of acrylamide and potassium acrylate mixed at the ratios of 0.3%, 0.5% and 1.0% with coarse sand and loamy sand. The highest values of swelling pressure were obtained for the 1% proportion, for coarse sand (79.53 kPa) and loamy sand (78.23 kPa). The time required to reach 90% of swelling pressure for each type of SAP differs. Samples of coarse sand mixed with SAP K2 in all concentrations reached 90% of total swelling pressure in 100 min, while the loamy sand mixtures needed only about 60 min. The results were the basis for developing a model for swelling pressure of the superabsorbent and soil mixtures, which is a fully stochastic model. The conducted research demonstrated that the course of pressure increase depends on the available pore capacity and the grain size distribution of SAPs. The obtained results and the proposed model may be applied everywhere where mixtures of SAPs and soils are used to improve plant vegetation conditions.

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Section: Introductionmentioning

confidence: 99%

The Characteristics of Swelling Pressure for Superabsorbent Polymer and Soil Mixtures

et al. 2020

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“…Whereas, in the experiment under analysis in this paper, evaporation after two days, for a sample in the case of which a dose of 1000 cm 3 of water was injected to the depth of 5 cm, amounted to 2.6 mm. A notably higher intensity of evaporation under laboratory conditions was obtained in a study by Śpitalniak et al [ 67 ], in which experiments were conducted on a soil material with particle size distribution of its mineral parts corresponding to that of loamy sand, i.e., identical to that used in the experiment analysed herein. After two days, water loss relative to the surface of the sample was as much as 18.5 mm.…”

Section: Resultsmentioning

confidence: 58%

Application of the TDR Sensor and the Parameters of Injection Irrigation for the Estimation of Soil Evaporation Intensity

Walczak

Lipiński

Janik

2021

Sensors

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The objective of the study was to develop a precise method of determination of the evaporation rate in a soil irrigated with the use of a mobile injection irrigation system. Two methods of constructing functions approximating the value of evaporation have been developed. In the first method, the domain comprises the parameters of injection irrigation, i.e., the dose and the depth of injection, and in the second, the volumetric moisture of soil in the layer immediately below the soil surface, which was measured with time-domain reflectometry (TDR) sensors. For that purpose, a laboratory experiment was carried out, based on 12 physical models. The study was conducted on a natural soil material, with particle size distribution of its mineral parts corresponding to that of a loamy sand soil. It was demonstrated that evaporation intensity increases with irrigation and decreases with increase in the depth of water application. Using TDR sensors, it was also shown that evaporation intensity increases proportionally to the weighted arithmetic mean of the volumetric moisture. Comparison of the two methods indicates that the evaporation intensity of injection-irrigated soil can be estimated with higher accuracy when the domain of the approximating function is the injection depth and dose than when the domain of the function is the weighted mean of volumetric moisture of the surface horizon of the soil. However, the method using TDR sensors for the estimation of evaporation intensity of an injection-irrigated soil has a greater potential for the construction of universal approximating models. In addition, the advantage of the method based on the use of TDR sensors is that it uses arguments for the approximating function, f2θ, in real time.

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“…The sensors were in the effective root zone at locations that provided a representative picture of the soil water status in the depths of 0.2, 0.4, and 0.6 m. During the nut setting, surface irrigation was applied by micro sprinklers placed at a height of 0.3 m above the soil surface. Additionally, Irrometer™ tensiometers were used to measure the potential of soil water and its changes in the soil profile [26][27][28]. Values were measured in kilopascals [kPa].…”

Section: Field Measurements 231 Soil Moisturementioning

confidence: 99%

Water Regime Monitoring of the Royal Walnut (Juglans regia L.) Using Sap Flow and Dendrometric Measurements

Bárek

Kovacova

Kišš

et al. 2021

Plants

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Changes in the distribution of annual rainfall totals, together with the increase in temperature over the last 40 years, are causing more frequent periods of drought, and plants are more often exposed to water stress. The aim of this study was to monitor the effect of different water regimes (irrigated and non-irrigated) of individuals of walnut tree (Juglans regia L.) in a private orchard located in the West of Slovakia. Our research was focused on dendrometric and sap flow measurements in the period from 28 March to 2 June 2019. The results showed differences in the sap flow of walnut trees during the budbreak period: when trees were irrigated, sap flow in the diurnal cycle was around 130 g·h−1 (20.48%), higher than in the non-irrigated treatment. Dendrometric differences between the irrigated and non-irrigated treatments were not significant. The sap flow data in the flowering period of the irrigated variant were slightly higher at 150 g·h−1 (35.62%) than non-irrigated. Dendrometric differences were more significant when the difference between the variants was more than 1.5 mm. Continuation of this research and analysis of the data obtained in the coming years will allow us to evaluate the effects of the environment on fruit trees in the long term.

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The Influence of a Water Absorbing Geocomposite on Soil Water Retention and Soil Matric Potential

Cited by 18 publications

References 90 publications

The Characteristics of Swelling Pressure for Superabsorbent Polymer and Soil Mixtures

The Characteristics of Swelling Pressure for Superabsorbent Polymer and Soil Mixtures

Application of the TDR Sensor and the Parameters of Injection Irrigation for the Estimation of Soil Evaporation Intensity

Water Regime Monitoring of the Royal Walnut (Juglans regia L.) Using Sap Flow and Dendrometric Measurements

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