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Table 7 Geoaccumulation index (Igeo) values of trace elements in the sediment

From: Distribution and ecological risk assessment of trace metals in surface sediments from Akaki River catchment and Aba Samuel reservoir, Central Ethiopia

Dry season Rainy season
Sites Cd Cr Cu Fe Pb Mn Ni Zn Cd Cr Cu Fe Pb Mn Ni Zn
S1 2.47 − 2.62 − 3.57 − 7.33 2.28 − 1.59 − 2.47 − 3.02 2.53 − 2.88 − 5.01 − 7.22 1.89 − 1.21 − 2.80 − 3.79
S2 2.53 − 2.25 − 4.23 − 6.38 2.16 − 0.21 − 1.96 − 2.94 2.64 − 2.20 − 4.81 − 6.00 1.93 0.26 − 2.09 − 2.85
S3 2.53 − 2.55 − 4.40 − 6.98 2.15 − 1.14 − 2.30 − 2.29 2.64 − 2.62 − 4.35 − 7.02 2.03 − 1.45 − 2.30 − 2.68
S4 2.69 − 3.06 − 5.40 − 7.43 2.05 − 1.77 − 2.71 − 4.35 2.78 − 2.23 − 3.91 − 7.31 1.76 0.52 − 2.14 − 2.47
S5 2.58 − 2.33 − 2.14 − 6.91 2.51 − 0.93 − 1.96 − 1.26 2.53 − 2.58 − 3.67 − 7.40 2.07 − 1.73 − 2.36 − 2.83
S6 2.22 − 1.63 − 4.94 − 7.02 3.09 0.05 − 1.49 − 4.78 2.47 − 2.57 − 3.44 − 7.31 2.16 − 1.59 − 2.36 − 2.20
S7 2.53 − 2.36 − 3.57 − 7.20 2.35 − 1.46 − 2.23 − 3.38 2.69 − 2.53 − 4.94 − 7.06 2.14 − 1.70 − 2.27 − 4.89
S8 2.53 − 2.28 − 3.70 − 7.16 2.10 − 1.11 − 2.16 − 5.15 2.53 − 2.38 − 4.76 − 6.98 2.09 − 1.24 − 2.29 − 1.90
S9 2.58 − 2.68 − 4.70 − 7.33 2.11 − 1.93 − 2.33 − 4.52 2.58 − 2.56 − 4.76 − 7.18 2.15 − 1.69 − 2.37 − 3.05
S10 2.47 − 2.10 − 4.06 − 6.38 2.28 − 0.26 − 2.01 − 3.51 2.58 − 2.50 − 4.06 − 7.14 2.14 − 1.56 − 2.23 − 2.97
S11 2.64 − 2.07 − 3.19 − 7.02 2.51 − 1.29 − 1.96 − 0.37 2.47 − 2.21 4.81 − 7.02 2.13 − 1.22 − 2.31 − 3.31