Purpose: complex calculations of the main canal and water supply network in the earth canal, taking into account the current technical state of the Chernozemelskaya watering and irrigation system.
Materials and methods. The materials were: documentation on the operation of reclamation water supply structures of the Chernozemelskaya watering and irrigation system, the results of field surveys of canals and instrumental measurement data. Two groups of initial data were used: information about the natural and climatic characteristics of the territory and geometric parameters of the calculated cross-section of the canal bed and its dams.
Results. It is recommended to determine filtration losses using known dependencies, taking into account specific flow rates. A number of assumptions were made: the filtration process was considered in one plane and taken into account as steady one; the impervious base was assumed to be theoretically impermeable and horizontal; the channel dam ground was taken into account as homogeneous. As a result of calculations by the proposed method (using two versions of the initial data), specific flow rates of 0.122 and 0.033 square meters/day for filtration through the dam body at maximum and actual (at the time of survey) filling of the canal were obtained respectively. The total two-way specific water consumption for filtration, taking into account the permeability of the channel base and its dams, was 0.912 and 0.445 square meters/day for the first and second options, respectively.
Conclusions. The good convergence of the values of the relative filtration flow rate with the results of calculations based on known dependencies confirms the possibility of using the proposed methodology for the filtration calculation of homogeneous ground channel dams on a permeable foundation without drainage. The sequence of calculations is designed in the form of a computer program, which allows calculating filtration water losses in the bulk sections of irrigation channels made on a permeable soil base (without drainage), as well as evaluate the current efficiency of the irrigation system.
irrigation channel, water loss, filtration, filtration calculation, efficiency
Baev O. A., Talalaeva V. F. Results of the complex filtration calculation of the Chernozemelskaya watering and irrigation system channels. Ways of Increasing the Efficiency of Irrigated Agriculture. 2024;93(2):249–263. (In Russ.).
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