Quantitative Estimate of the Heterogeneity of Solute Fluxes Using the Dispersivity Length for Mathematical Models of Pesticide Migration in Soils

Шеин, Е. В.; Belik, A. A.; Кокорева, А. А.; Kolupaeva, V. N.

doi:10.1134/s1064229318070086

Cited by 8 publications

(3 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, it was decided to conduct another series of filtration column experiments with small monoliths (d=5 cm, h=10 cm), the obtained values of dispersivity length are presented in the Table 2. The method of field determination of dispersivity lengths is described in detail in an article with colleagues [18]. In this work, the values shown in Fig.…”

Section: Fig 2 Experimental and Predicted Temperature Datamentioning

confidence: 99%

Migration of cyantraniliprole in fractured soils: calibration of pesticide leaching model by using experimental data

2020

View full text Add to dashboard Cite

The phenomenon of preferential migration of substances can increase the risk of pesticides. In the first year of the experiment, in 7 days after application cyantraniliprole penetrated to a depth of 25 cm in agrosoddy-podzolic soil. In the next year on the 7th day after application the pesticide was detected at a depth of 15 cm. The pesticide migrated deeper than the unconfigured PERL model took into account. The calibration of the PERL model by using experimental data (soil experimental support) allowed to reduce the error of prediction. The obtained data can be used to create new standard soil and climate scenarios for pesticide leaching models.

show abstract

Section: Fig 2 Experimental and Predicted Temperature Datamentioning

confidence: 99%

Migration of cyantraniliprole in fractured soils: calibration of pesticide leaching model by using experimental data

2020

View full text Add to dashboard Cite

show abstract

“…First, the main characteristics that determine the fate of the pesticide, the half-life DT50, and the sorption constant Kd are determined in laboratory experiments and cannot always be extrapolated to field conditions [10]. The second reason may be the phenomenon of preferential flows, widely known and described in the literature [11]. At present, efforts are being made to include a computation unit describing the movement of water and solutions with preferential flowsin all pesticide fate models [12].…”

Section: Introductionmentioning

confidence: 99%

Influence of hydrodynamic dispersion and nonequilibrium sorption on the prediction of pesticide concentrations in lysimetric leachate

Kolupaeva

Кокорева

2022

BIO Web Conf.

View full text Add to dashboard Cite

The article discusses issues related to the development of pesticide modeling in the environment and its use in order to regulate the circulation of pesticides. As the study of the literature and the author's experience in using mathematical models shows, the main problem and source of errors in modeling is the quality of the input data for the soil block of the model, as well as those characterizing the properties of the pesticide. Using the results of a carefully conducted lysimetric experiment to study the migration of cyantraniliprole outside the soil profile, as well as auxiliary studies, the influence of hydrodynamic dispersion on the behavior of the insecticide and the results of modeling is shown. The parameters of its non-equilibrium sorption by the soil were calculated according to the data of the laboratory experiment investigating the dynamics of decomposition of cyantraniliprole. The article confirms the need to take these processes into account when modeling the transport of pesticides.

show abstract

“…This method allows studying of undamaged pore space under any watering. Till now, popular methods used to study morphological structure of soils included analyzing of thin soil sections and soil fracture faces using optical and electronic microscopes (Gerke et al 2012), as well as monitoring of dye traveling to determine paths of solution migration in soils (Shein et al 2018). However, all the previous methods are destructive; besides, due to the variability of pore space and small scope of the study, a required number of samples can be up to 100 thin sections (Skvortsova et al 2015), and experiments with field watering are impossible during monitoring of dye traveling.…”

Section: Introductionmentioning

confidence: 99%

Characterizing macropore structure of agrosoddy-podzolic soil using computed tomography

et al. 2020

View full text Add to dashboard Cite

The agrosoddy-podzolic soil (Eutric Albic Glossic Retisol (Abruptic, Loamic, Aric, Cutanic)) is typical for Moscow Oblast and is used for agricultural purposes, resulting in use of various agrochemicals and pesticides. The presence of macropores and cracks in such soils leads to preferential water and substance transfer and nonequilibrium conditions. Therefore, it is important to study the numerical characteristics of the pore space of soils to adjust mathematical models of substance transfer. Undisturbed soil monoliths 10 cm in diameter taken from Ap (from 0 to 30 cm) and E, BE horizons (from 30 to 50 cm) were investigated under the field moisture conditions and after saturation using the tomographic core analyzer RKT-180 with the resolution of 200 μm/pixel. Using the X-ray computer tomography, it has been established that the plough layer of the agrosoddy-podzolic soil contains over 7% of macropores larger than 1 mm, while the subsurface layer has a porosity of about 3%. After saturation, some of the inter-aggregate pores overlap, which leads to a decrease in the total porosity to 4% in the upper and 2% in lower horizons, as well as increase in the average pore diameter. The number of macropores determined by tomographic analysis is one third higher than the values calculated using pedotransfer functions for this soil. The data obtained in this paper are recommended for use in national scenarios of migration of substances (pesticides, agrochemicals, salts) in soils.

show abstract

Quantitative Estimate of the Heterogeneity of Solute Fluxes Using the Dispersivity Length for Mathematical Models of Pesticide Migration in Soils

Cited by 8 publications

References 8 publications

Migration of cyantraniliprole in fractured soils: calibration of pesticide leaching model by using experimental data

Migration of cyantraniliprole in fractured soils: calibration of pesticide leaching model by using experimental data

Influence of hydrodynamic dispersion and nonequilibrium sorption on the prediction of pesticide concentrations in lysimetric leachate

Characterizing macropore structure of agrosoddy-podzolic soil using computed tomography

Contact Info

Product

Resources

About