Purpose: to model and substantiate the hydrodynamic process patterns of flow motion in the irrigation canal system for the purposes of operational water distribution control.
Materials and methods. The object of the study is the MR-2 canal of the Miusskaya irrigation system in the Rostov region. The organization and conduct of experiments are based on a methodological approach that combines empirical observation data, the similarity theory method, mathematical modeling, and simulation experiments with the Saint-Venant equations to establish the hydrodynamic process patterns of flows in the distribution canal system under various operating modes to solve a full range of problems of operational water distribution control.
Results and discussion. The numerical solution of the Saint-Venant equations for steady and unsteady flow conditions in the irrigation canal beds was proposed and tested. A comparative calculation of the water volume values deviation in the canal sections was carried out: in section 1 (trapezoidal cross-sectional profile) with a design flow rate (Q, m³/s) from 0.94 to 2.4 m³/s, the relative deviation (Δ, %) was from 6.8 to 13.4 % with maximum values from 17.2 to 27.1 %, respectively; in section 4 (flume network) with a design flow rate (Q, m³/s) from 0.15 to 0.8 m³/s, the relative deviation (Δ, %) was from 7.2 to 20.0 % with maximum values (Δmax, %) from 13.1 to 21.5 %, respectively.
Conclusions. Mathematical modeling, systems analysis and optimal decision theory resulted in the development of new algorithms and a computer program that significantly increased labor productivity compared to manual calculations, increased the efficiency of water and energy resource use by 10–15 %, and optimized the processes of information collection, processing, and transmission systems.
doi: 10.31774/2712-9357-2025-15-4-66-83
modeling, flow regime, operation, irrigation system, water distribution
Olgarenko I. V., Olgarenko V. I., Kolganov A. V., Olgarenko V. Ig. Modeling and research of hydrodynamic flow patterns in irrigation system canals for operational water distribution control. Land Reclamation and Hydraulic Engineering. 2025;15(4):66–83. (In Russ.). https://doi.org/10.31774/2712-9357-2025-15-4-66-83.
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Funding source: subsidies for the implementation of State Assignment No. 082-00062-25-00 are from the federal budget.
