Evaluating the status of the water quality of freshwater bodies is crucial for safe use. In this work, the water quality of an understudied Mediterranean reservoir was investigated, using Water Quality Index (WQI) and principle component analysis (PCA) during an 8-year study period, between 2009 and 2016. The WQI was analyzed based on weighted sum aggregation function, considering the following variables: temperature, salinity, pH, conductivity, dissolved oxygen, nitrate, nitrite, ammonia, phosphate, sulfate, and total dissolved solids. After describing the evolution of these variables, WQI was evaluated. It was mostly moderate and showed a deteriorating trend between 2009 and 2016. This deterioration was due to the previously weakened water infrastructure that was furthermore impacted by the sudden increase in the habitants of the basin following Syrian refugees influx after 2011 Syrian crisis. In a new approach, WQI results were also compared to river inflow, reservoir water depth and precipitation. WQI increased with the increased water depth and water volume of the reservoir showing better water quality. Monthly precipitation above 250 mm showed better water quality and increased WQI. No clear relation was found between the WQI and the river flow. PCA analysis indicated that water quality in the reservoir was affected by erosion and fertilizers. WQI results agreed with Carlson Trophic State Index previously applied to the reservoir. These innovative results linking WQI to hydrological variables, urbanization, and trophic index together with the incorporation of PCA with WQI provide a multidimensional nature of water quality evaluation concept.

评估淡水水体的水质状况对于安全使用至关重要。在这项工作中，使用水质指数（WQI）和主成分分析（PCA）在2009年至2016年之间的8年研究期内，对一个被研究不足的地中海水库的水质进行了研究。基于加权总和对WQI进行了分析。考虑以下变量的聚集函数：温度，盐度，pH，电导率，溶解氧，硝酸盐，亚硝酸盐，氨，磷酸盐，硫酸盐和总溶解固体。在描述了这些变量的演变之后，对WQI进行了评估。在2009年至2016年期间，大部分时间为中度且呈恶化趋势。这种恶化的原因是先前的水利基础设施薄弱，再加上2011年叙利亚危机后叙利亚难民涌入后流域居民的突然增加进一步影响了这一状况。在一种新方法中，还将WQI结果与河流入流，水库水深和降水进行了比较。随着水深的增加和水库水量的增加，WQI增大，表明水质更好。250毫米以上的月降水量显示出更好的水质和WQI的增加。在WQI与河流流量之间没有发现明确的关系。PCA分析表明，水库的水质受到侵蚀和肥料的影响。WQI结果与先前应用于储层的卡尔森营养状态指数相符。这些创新的结果将WQI与水文变量，城市化，