Purpose: to determine a correlation between indicators of the qualitative composition of drainage waters from irrigation systems located in the south of Rostov region and corresponding indicators of the qualitative composition of natural waters in water bodies used as water intakes.
Materials and methods. Data obtained by Rostov Hydrogeological and Reclamation Party were used as source materials.
Results. Hydrochemical indicators of drainage waters from irrigated lands in the south of Rostov region during the period of time considered are subject to significant fluctuations, therein, the values of such indicators as: pH, suspended substances, hydro-carbonate ions, carbonate ions, ammonium ions, nitrite ions, nitrate ions, phosphorus phosphates, copper ions, anionic surfactants, zinc, petroleum products, total chromium ion, herbicides and insecticides are within the maximum permissible concentrations of harmful substances determined for fishery facilities; the concentration of calcium, phosphate ions, total ferrum and total hardness in drainage waters is always greater than in natural ones; dry residue, the concentration of chlorides, sulfates and magnesium, in drainage waters can be either greater or less than in natural ones at different periods of time; indicators of biochemical oxygen consumption in drainage waters, although they exceed the maximum permissible concentration for objects of fishery significance, are always less than in natural waters.
Conclusions. It is necessary to determine the existence of relationship between indicators of the qualitative composition of drainage waters from irrigation systems in other areas of Rostov region with the corresponding indicators of the qualitative composition of natural waters in water bodies used as water intakes, to justify the importance of developing and approving regional standards for maximum permissible concentrations of harmful substances that correlate with background indicators of these substances, which will allow the Federal State Budgetary Institution Rostovmeliovodkhoz Management to reduce existing payments for negative impact of drainage water from irrigated lands on water bodies used as water intakes.
drainage water, drainage systems, quality indicators of drainage water, negative impact on the environment
Vlasov M. V., Kupriyanova S. V. On issue of assessing the drainage water quality from irrigated lands in the south of Rostov region. Ways of Increasing the Efficiency of Irrigated Agriculture. 2023;91(3):322–331. (In Russ.).
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