Table 2 Water quality environmental indicators.
Region | Location | Total hardness (mg/L, calculated as CaCO3) | Electrical conductance (μs/cm) | Eh (mV) | DO (mg/L) | CODcr (mg/L) | pH |
|---|---|---|---|---|---|---|---|
Group A | Upstream | 49.69 | 114.67 | 209.83 | 7.21 | 23.44 | 7.76 |
Midstream | 56.42 | 129.00 | 200.00 | 7.65 | 23.00 | 7.63 | |
Downstream | 57.33 | 136.00 | 195.60 | 7.93 | 23.80 | 7.60 | |
Group B | Upstream | 155.79 | 365.00 | 183.00 | 7.45 | 30.29 | 8.09 |
Midstream | 171.16 | 379.33 | 171.33 | 7.70 | 34.52 | 7.89 | |
Downstream | 137.62 | 294.75 | 197.75 | 7.39 | 22.18 | 7.57 | |
Mainstream | Upstream | 50.01 | 114.14 | 170.25 | 6.65 | 23.96 | 7.51 |
Midstream | 63.00 | 150.17 | 196.00 | 7.44 | 21.43 | 7.64 | |
Downstream | 68.20 | 163.67 | 203.67 | 6.93 | 22.26 | 7.66 |
