Annotation

Purpose: to conduct a primary assessment of the prospects for using the HYDRUS-1D software product or analyzing the dynamics of the electrical conductivity of water extract and moisture content of dark chestnut soil. 

Materials and methods. The study was conducted in 2023–2024 in the Republic of Crimea and included the following: determination of moisture content, particle size distribution, and electrical conductivity of soil water extract; calculation of soil water flow indicators using the Rosetta Lite V1.1 software module; meteorological data recording; modeling the dynamics of dark chestnut soil moisture content and water extract electrical conductivity. The determination of pedotransfer functions was carried out in two ways: based on the particle size distribution; based on a combination of actual data on particle size distribution and reference information on soil bulk density. 

Results. Relatively small values of the average absolute error and the root of the root mean square error were obtained for the average meter-long soil layer for both options. Moreover, the data simulated by the first option are closer to the actual values (the determination coefficient for soil moisture was 0.76, and for the water extract electrical conductivity – 0.83). However, a significant difference was recorded for the top 20 cm of soil, between the calculated and simulated data for the electrical conductivity of the water extract (by 2.1 and 2.0 times, depending on the option), which significantly decreases at a depth of 40–60 cm. 

Conclusions. On average, for a meter-thick soil layer, the use of the HYDRUS-1D software package allowed us to simulate changes in soil moisture and water extract electrical conductivity with a fairly high accuracy. To improve the reliability of the results, further research is needed to collect initial data and validate the model. 

doi: 10.31774/2712-9357-2026-16-1-36-60

For quoting

Podovalova S. V., Volkov A. S. Initial assessment of the prospects for using agrohydrological modeling to analyze the dynamics of moisture and electrical conductivity of water extract of dark chestnut soil. Land Reclamation and Hydraulic Engineering. 2026;16(1):36–60. (In Russ.). https://doi.org/10.31774/2712-9357-2026-16-1-36-60.

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