Additional file 1 of Risk assessment of heavy metals in the surface sediment at the drinking water source of the Xiangjiang River in South China

Additional file 1: Table S1. Parameters of sediment samples. All values are given as mean values with standard deviation. Table S2.$$ E_{r}^{i} $$Eri values of heavy metals in sediment. All values are given as mean values with standard Figure S1. PCA score plot of heavy metals in the sediment of different sampling sites.