A methodological approach to assessing the impact of a cage-type fish farm on hydrochemical parameters

An assessment of the hydrochemical parameters of the environment at the location of the operating fish farm was carried out using the absolute and relative content of dissolved oxygen, permanganate oxidizability, bichromate oxidizability, nitrites, ammonium nitrogen, and phosphate phosphorus using generally accepted chemical methods. Water sampling was carried out at three points in spring summer and autumn in 2023-2024. Based on the results of the conducted research, the hydrochemical parameters are estimated by season. It was determined that the flow velocity did not meet the requirements in the autumn period, the oxygen regime in the area under consideration was satisfactory, the total amount of organic substances exceeded the standard, increased organic pollution of the watercourse was noted in the summer, the accumulation of mineral phosphorus was observed in the summer and autumn periods without noticeable eutrophication of the water body. The parameters for assessing the impact of cage-type fish farming on a flowing water body are highlighted. The results make it possible to assess the impact of cage farming on a water body and can be used to optimize fish growing conditions and preserve the ecological well-being of the reservoir.