Abstract

Changes in the hydrochemical regime of a small river due to anthropogenic load lead to a deterioration in water quality. Pollution of water bodies can affect the volume of production in the fisheries industry. Therefore, a pressing issue for modern fisheries is the continuous monitoring and comprehensive ecological assessment of the quality of surface waters. The study aims to investigate the water quality index (WQI) for fish farming in the Umanka River within the city limits of Uman. As a typical urban river, Umanka experiences the influence of slow water flow, constant discharge of polluted water, ecological degradation, and weak self-purification. Therefore, the need to study and improve the water quality of the Umanka River is quite evident. WQIs are calculated based on the results of analytical measurements of hydrochemical properties of water, such as dissolved oxygen, pH, total (bicarbonate) alkalinity, total mineralization, nitrates, nitrites, ammonium nitrogen, etc. Confirmation of a moderate increase in the concentration of ion composition indicators in the water section studied after the city of Uman is provided by the results of WQI calculations for fish farming during 2021 and 2022 for the analyzed water samples in the direction of the Umanka River flow. Judging by the QWI values for fisheries purposes in 2021, waters from sampling points 1–5 are characterized as “Satisfactory,” with the exceptions being points 6 as “Good” and 7 as “Very Poor.” In 2022, water from the study area in the city of Uman (points 1 and 2) is characterized as “Good,” while the others (points 3–7) are considered “Satisfactory.” Thus, there is an observed deterioration in water quality for fish farming in the research area after the city of Uman.

中文翻译：

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小河流经济用水环境安全评价

摘要

人为负荷导致小河水化学状况发生变化，导致水质恶化。水体污染会影响渔业的产量。因此，现代渔业面临的一个紧迫问题是地表水质量的持续监测和综合生态评估。该研究旨在调查乌曼市范围内乌曼卡河养鱼的水质指数（WQI）。乌曼卡河作为典型的城市河流，受到水流缓慢、污水不断排放、生态退化、自净能力弱等影响。因此，研究和改善乌曼卡河水质的必要性十分明显。WQI是根据水的水化学性质的分析测量结果计算的，例如溶解氧、pH、总（碳酸氢盐）碱度、总矿化度、硝酸盐、亚硝酸盐、铵态氮等。确认水体浓度适度增加根据2021年和2022年乌曼卡河流向分析水样的养鱼WQI计算结果，提供了乌曼市之后研究的水段中的离子成分指标。根据 2021 年渔业 QWI 值判断，采样点 1-5 的水域特征为“满意”，但点 6 为“良好”，点 7 为“非常差”。2022 年，乌曼市研究区的水质（第 1 点和第 2 点）被评为“良好”，而其他地区（第 3-7 点）则被视为“满意”。因此，乌曼市之后的研究区域养鱼水质明显恶化。