Simulation modeling of the subsurface irrigation process

Objective: to study the efficiency of subsurface irrigation on inclined slope models using a horizontal well simulator. To assess the influence of various irrigation parameters, an inclined slope model was developed for experiments, and various irrigation modes were investigated using a horizontal well simulator. Materials and methods. Measurement of the efficiency indicators of the slope angle and the soil moisture level were carried out in laboratory conditions, experiments using a horizontal well simulator; the method of mathematical modeling was used to analyze the moisture processes; statistical methods were used to process the experimental data. This work is based on the analysis of methods and ways of irrigation on inclined surfaces of soil ground. To consider the process of subsurface irrigation, inclined slopes of sand soil were modeled on a laboratory installation of the author’s design, implemented at the Department of Hydraulics and Agricultural Water Supply of the Kuban State Agrarian University. A multifactorial experiment was conducted on a pilot laboratory setup to study the technical feasibility of implementing high-quality irrigation of agricultural crops grown on inclined slopes using horizontal well simulators, equidistantly located down the slope. Results. The data obtained during the laboratory experiment were processed, and based on their analyses, graphs were constructed showing the dependences of water penetration distances on its volumes at angles of inclination to the plane from 10 to 30 degrees. Conclusion. Based on the analysis of the results of the experiments, a graph was obtained for the first time, displaying the trajectory of movement of irrigation water during the modeling of subsurface irrigation using a horizontal well simulator, demonstrating the movement of the main water flow, representing the trajectory of a descending curve, originating directly from the horizontal well simulator and ending at its lower boundary.

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