The present study investigated the concentrations of potentially toxic elements in water and sediments of the Dor River and its tributaries. The physicochemical parameters of water and sediment samples were investigated, including potentially toxic elements (PTEs), such as Fe, Ni, Co, Zn, Cd, Pb, Mn, and Cr. Among the PTEs tested, the highest concentration in water was observed for Fe 787 $\mathrm{\mu }$g/L upstream and the lowest was observed for Cd 1.98 $\mathrm{\mu }$g/L downstream. The human risk posed by the PTE concentrations in water was evaluated. The maximum CDI value was observed for Fe 48.3 $\mathrm{\mu }$g/kg-day and the maximum HQ value was observed for Co 2.73 for children downstream owing to their water consumption. The PTE concentrations in sediments were evaluated for the quantification of pollution and the ecological risk index (ERI). The Dor River and its tributaries were classified according to the contamination factor (CF): Cr, Co, and Zn had low CF, Pb indicated a moderate CF and Cd had a considerable CF. The pollution level index values attributed to sediment concentrations were slightly higher than 1, suggesting pollution in the river. The highest and lowest ERI values in sediments were calculated for Cd of 168 and Zn 0.45, respectively. The downstream sediment of the study area posed a moderate ecological risk level to aquatic systems due to Cd.

本研究调查了多尔河及其支流的水和沉积物中潜在有毒元素的浓度。研究了水和沉积物样品的理化参数，包括潜在的有毒元素（PTE），例如铁，镍，钴，锌，镉，铅，锰和铬。在测试的PTE中，观察到Fe 787在水中的最高浓度$\mathrm{\mu }$g / L上游，Cd 1.98最低 $\mathrm{\mu }$下游g / L。评价了水中PTE浓度造成的人为危险。观察到Fe 48.3的最大CDI值$\mathrm{\mu }$克/千克·天，并且由于其饮水量，对下游儿童观察到Co 2.73的最大HQ值。对沉积物中的PTE浓度进行了评估，以量化污染和生态风险指数（ERI）。多尔河及其支流根据污染因子（CF）进行分类：Cr，Co和Zn的CF较低，Pb表示中等的CF，Cd则具有相当的CF。归因于沉积物浓度的污染水平指数值略高于1，表明这条河中存在污染。计算出Cd为168和Zn为0.45时沉积物中的最高ERI值和最低ERI值。由于镉，研究区的下游沉积物对水生系统构成了中等生态风险水平。