Surface water pollution is a global problem and has been evident for a long period of time. Hence, the aim of the study was to evaluate the hydro-geochemical characteristics of Selamko farm reservoir water quality and its suitability for multipurpose uses using GIS-based water quality indices. The water sampling sites and parameters were selected systematically based on the land use, land cover, and anthropogenic activities around Selamko reservoir watershed in Debre Tabor, Ethiopia. Water samples were collected from 11 sampling stations from July 2019 to March 2020 using the composite sampling method and examined using standard procedures. The suitability of the reservoir's water quality for multipurpose use was investigated using drinking and irrigation water quality indices, and other tools. The spatial distribution maps of water quality parameters were prepared using the kriging method in ArcGIS 10.5. The results of the geospatial analysis indicated that the reservoir water quality parameters had spatial variation, which was caused by industrial and household wastewater inflow across the reservoir's watershed. Based on WHO and ES standards, the computed drinking water quality index results revealed that 81.81% and 18.18% of the reservoir's water quality fall into the poor to very poor classes, which indicates that the water in the reservoir is not fit for drinking. However, a Wilcox diagram, irrigation indices, and USEPA regulations revealed that the reservoir water quality is found to be safe and suitable for irrigation, fishing, and livestock purposes. The study concluded that Selamko reservoir's water quality is suitable for irrigation, fishing, and livestock watering with proper management accordingly.

地表水污染是一个全球性问题，并且在很长一段时间内都很明显。因此，本研究的目的是使用基于 GIS 的水质指数评估 Selamko 农场水库水质的水文地球化学特征及其对多用途用途的适用性。根据埃塞俄比亚德布雷塔博尔 Selamko 水库流域周围的土地利用、土地覆盖和人为活动，系统地选择了水样点和参数。2019 年 7 月至 2020 年 3 月，采用复合采样法从 11 个采样站采集水样，并使用标准程序进行检查。使用饮用水和灌溉水质指数和其他工具调查水库水质是否适合多用途使用。水质参数空间分布图采用ArcGIS 10.5中的克里金法制作。地理空间分析结果表明，水库水质参数存在空间变化，这是由工业和生活废水流入水库流域引起的。根据WHO和ES标准，计算得出的饮用水水质指标结果显示，81.81%和18.18%的水库水质属于差到极差，说明水库水不适合饮用。然而，威尔科克斯图、灌溉指数和 USEPA 规定表明，水库水质安全，适合灌溉、捕鱼和畜牧业。研究得出结论，Selamko 水库'