Assessment and forecast of water quality in the River Ingulets irrigation system

Abstract

<p>Scarcity of water is one of the most important problems of irrigated farming. Safe use of contaminated water and waste-water needs continuous monitoring of the water quality and its influence on the irrigated lands and cultivated crops. The Ingulets irrigation system is one of the main systems, which supplies with water fields of Kherson and Mykolaiv regions of Ukraine. The water is contaminated by the effluent disposals and wastes of the metallurgic factories. The new water quality improvement technique was introduced in the Ingulets irrigation system in 2010. The study is dedicated to agricultural assessment of the Ingulets irrigation system water quality with the new amelioration technique by using the FAO and DSTU 2730-94 criteria. It was established, that water quality in the Ingulets irrigation system is still poor, though it becomes better each year since 2010 till nowadays. Total dissoluble salts content in the water is 1489-2280 mg/L, toxic ions content in eCl<sup>-</sup> is 10.49-21.63 me/L, sodium adsorption ratio is 4.33-7.94 me/L, sodium percentage is 46.4-58.9%, magnesium to calcium ratio is 1.03-1.68, power of hydrogen is 7.31-8.72 in the period from 2007 to 2017. So, the Ingulets irrigation system water requires further amelioration to become safe and suitable for irrigation without any restrictions. Short-term forecast of the water quality by using the triple exponential smoothing with handling of the seasonal effects with multiplicative method of the Holt-Winters algorithm showed that significant improvement of the water quality by some criteria should be achieved till 2025: total dissoluble salts content in the water should be 1212 mg/L, toxic ions content in eCl<sup>-</sup> should be 6.61 me/L, sodium adsorption ratio should be 4.31 me/L, sodium percentage should be 49.3%, magnesium to calcium ratio should be 1.05, power of hydrogen should be 8.05 in 2025. </p>

Agro-Environmental Evaluation of Irrigation Water from Different Sources, Together with Drainage and Escape Water of Rice Irrigation Systems, According to its Impact on Maize

“…The scientific research involved the study of such variants: The irrigation water samples for watering crops were taken with the volume of 10 litres in four replications in pure plastic containers from irrigation systems mains: Ingulets (latitude 47°0'55"N and longitude 32°47'20"E), Krasnoznamianka (latitude 46°17'1"N and longitude 33°8'8"E), as well as drainage and escape water of the rice irrigation systems of the Institute of Rice of the National Academy of the Agrarian Sciences of Ukraine (latitude 46°08'34"N and longitude 32°57'15"E). The water of the Ingulets irrigation system is systematically contaminated by the effluent disposals of metallurgic production of the Kryvbas (latitude 47º56'07"N and longitude 33º03'40"E), and improved by mixing with the water of the Dnipro River (Lykhovyd and Kozlenko, 2018). The source of water for the Krasnoznamianka irrigation system is the Dnipro River.…”

Hydrochemical Indicators Dynamic in Surface Water

“…A significant problem of the reservoirs of the Mykolaiv area (Ukraine) is dumping of the polluted sewage. Sewage is discharged by 66% of water users, 40% of whom discharge contaminated wastewater [Shakhman et al, 2017;Lykhovyd et al, 2018;Bashynska, 2018;Mitryasova et al, 2021;Shakhman and Bystrintseva, 2021]. The Black Sea river basin covers about 60% of the area of all river basins in the region and currently the Regional office of water resources monitor the water bodies condition, assesses irrigated lands, agricultural lands and settlements that are flooded, as well as hydrochemical and radiological control of border water bodies by agreement between the governments of neighboring countries [Farrelly and Brown, 2011;Vlasov and Hryshchankava, 2014;Ignatowicz, 2020].…”

Effect of degree of salinity on seed germination and initial growth of chickpea (Cicer arietinum)

“…The main cultivation areas for chickpea in Ukraine are located in the South of the country, and the plants are often exposed to salinity stress there. For example, there is the large saline and alkaline land tract of the Ingulets irrigation system basin in the South of Ukraine, where chickpea is cultivated on numerous farms (Lykhovyd & Kozlenko, 2018). Therefore, it is very important to understand the reaction of the crop to these unfavourable factors in order to provide sustainable production of qualitative chickpea grain.…”