This study innovatively evaluates the impact of hydropower plants located in a diversion channel on water quality dynamics. The spatial characteristics of water in the diversion channel above and below a hydropower plant were assessed; specifically, the investigation was conducted in the watercourse undeveloped by the hydropower plant and at reference points. Among the five analyzed points, the strongest statistically significant changes were observed in electrical conductivity, pH, and dissolved oxygen. Statistical analyses showed a similar, statistically significant relationship for most months. The water quality indicators proposed in this study help assess hydropower plants’ impact on water quality dynamics because they enable water comparison at different locations. The best water quality, as calculated using designated indices, was recorded below the hydropower plant. Among the physicochemical parameter values, the most noticeable change occurred in dissolved oxygen below the hydropower plant and below the fixed weir; its value was 8.10 and 5.32% higher in the two locations at the reference point below the hydropower facility. Moreover, the NH₄-N content was higher by 7.06% below the weir than the point below the hydropower plant. In the long term, this research may help plant operators manage water resources on watercourses with hydropower development more efficiently, according to sustainable development principles. This research will contribute to the rational management of such facilities on diversion channels considering sustainable water management principles.

中文翻译：

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小水电站对引水及天然河道水质动态的影响

本研究创新性地评估了位于引水渠中的水电站对水质动态的影响。对水电站上下导水渠水的空间特征进行了评估；具体而言，调查是在水电站未开发的水道和参考点进行的。在五个分析点中，在电导率、pH 值和溶解氧方面观察到了最强的统计显着变化。统计分析表明，大多数月份都存在类似的、具有统计学意义的关系。本研究中提出的水质指标有助于评估水电站对水质动态的影响，因为它们可以在不同地点进行水比较。使用指定指数计算的最佳水质，记录在水电站下方。在理化参数值中，水电站以下和固定堰以下的溶解氧变化最为显着；在水电设施下方参考点的两个位置，其值分别高出 8.10% 和 5.32%。此外，NH堰下_4- N含量比水电站下点高7.06%。从长远来看，根据可持续发展原则，这项研究可以帮助工厂运营商通过水电开发更有效地管理水道上的水资源。这项研究将有助于在考虑可持续水资源管理原则的情况下对引水渠道上的此类设施进行合理管理。