Table 6 Average degree of contamination based on Cd, potential risk based on Er and RI and the corresponding evaluation standards for potential ecological risk
Rivers | Comprehensive contamination factor (Cd) | Contamination status based on Cd | Â | Â | Â | Â | Er | Â | Â | Â | RI | Contamination status based on RI | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mn | Cu | Pb | Zn | Ni | As | Cd | Cr | |||||||
Ramganga | 2.99 | Low | 1.90E-01 | 2.55E + 00 | 6.75E + 00 | 4.39E-02 | 2.46E + 00 | 3.00E + 00 | 2.00E-01 | 2.00E-01 | 15.39 | Low | ||
Ghaghara | 0.62 | Low | 5.40E-02 | 2.63E-01 | 1.00E-01 | 4.40E-04 | 9.08E-01 | 2.23E + 00 | 0.00E + 00 | 1.70E-01 | 3.73 | Low | ||
Gandak | 0.54 | Low | 5.80E-02 | 2.43E-01 | 0.00E + 00 | 7.70E-04 | 9.08E-01 | 2.10E + 00 | 0.00E + 00 | 8.67E-02 | 3.40 | Low | ||
Kosi | 0.44 | Low | 4.10E-02 | 1.80E-01 | 0.00E + 00 | 7.50E-04 | 4.83E-01 | 2.20E + 00 | 0.00E + 00 | 9.40E-02 | 3.00 | Low | ||