Table 2 Water quality indicators (mean ± sd) for LFR, EF, PF, and EFR seasons in the BTB river system
Settlements | |||||||
|---|---|---|---|---|---|---|---|
Boro | Maun | Xobe | Samedupi | Chanoga | Motopi | BOBS | |
Temperature (°C) | |||||||
LFR | 26.5 ± 0.1 | 30.3 ± 0.0 | 32.0 ± 0.1 | 28.8 ± 0.1 | 32.1 ± 0.0 | 30.6 ± 0.0 | N/A |
EF | 19.5 ± 0.2 | 20.6 ± 0.0 | 17.8 ± 0.0 | 19.5 ± 0.0 | 19.2 ± 0.0 | 18.8 ± 0.0 | |
PF | 20.9 ± 0.0 | 23.2 ± 0.0 | 21.8 ± 0.1 | 21.5 ± 0.0 | 24.2 ± 0.0 | 22.8 ± 0.0 | |
EFR | 26.4 ± 0.0 | 27.5 ± 0.1 | 23.7 ± 0.0 | 24.6 ± 0.2 | 29.2 ± 0.1 | 28.4 ± 0.0 | |
Conductivity (μS cm-1) | |||||||
LFR | 118.2 ± 0.6 | 123.0 ± 0.7 | 123.2 ± 0.8 | 127.4 ± 0.1 | 134.0 ± 0.0 | 131.1 ± 0.1 | <1000 |
EF | 104.0 ± 1.2 | 121.6 ± 9.3 | 124.1 ± 0.3 | 126.4 ± 0.1 | 133.0 ± 0.0 | 152.7 ± 0.8 | |
PF | 92.1 ± 0.8 | 113.3 ± 1.8 | 104.1 ± 0.0 | 110.0 ± 0.1 | 106.6 ± 2.2 | 112.8 ± 7.9 | |
EFR | 113.8 ± 0.5 | 122.1 ± 0.1 | 126.1 ± 1.0 | 127.8 ± 0.0 | 128.3 ± 0.1 | 119.4 ± 0.1 | |
pH | |||||||
LFR | 6.7 ± 0.0 | 7.2 ± 0.1 | 7.8 ± 0.4 | 7.4 ± 0.0 | 8.1 ± 0.0 | 7.6 ± 0.2 | 6.5–8 |
EF | 6.8 ± 0.0 | 7.4 ± 0.3 | 7.2 ± 0.1 | 7.5 ± 0.1 | 7.6 ± 0.0 | 7.6 ± 0.0 | |
PF | 7.3 ± 0.0 | 7.4 ± 0.2 | 7.5 ± 0.1 | 7.3 ± 0.0 | 7.7 ± 0.1 | 7.4 ± 0.0 | |
EFR | 7.0 ± 0.0 | 7.1 ± 0.0 | 7.5 ± 0.2 | 7.3 ± 0.0 | 7.8 ± 0.0 | 6.6 ± 0.1 | |
Turbidity (NTU) | |||||||
LFR | 2.4 ± 0.2 | 6.8 ± 0.2 | 11.4 ± 0.20 | 4.1 ± 0.2 | 4.4 ± 0.4 | 8.8 ± 0.2 | 5 |
EF | 0.8 ± 0.0 | 3.0 ± 0.2 | 4.9 ± 0.7 | 4.8 ± 0.2 | 3.3 ± 0.4 | 10.0 ± 0.5 | |
PF | 1.7 ± 0.2 | 3.3 ± 0.6 | 8.0 ± 0.2 | 3.8 ± 0.2 | 8.0 ± 0.6 | 9.0 ± 0.1 | |
EFR | 1.3 ± 0.0 | 6.3 ± 0.2 | 3.7 ± 0.7 | 1.9 ± 0.2 | 2.9 ± 0.2 | 8.1 ± 0.7 | |
E. coli (CFU/100 ml) | |||||||
LFR | 54 ± 1 | 126 ± 0 | 127 ± 2 | 64 ± 4 | 82 ± 5 | 98 ± 15 | 0 |
EF | 6 ± 3 | 168 ± 1 | 93 ± 2 | 186 ± 5 | 77 ± 2 | 139 ± 4 | |
PF | 22 ± 0 | 102 ± 1 | 70 ± 1 | 106 ± 3 | 43 ± 3 | 32 ± 1 | |
EFR | 20 ± 1 | 123 ± 1 | 56 ± 1 | 84 ± 2 | 40 ± 4 | 104 ± 9 | |
Fecal streptococci (CFU/100 ml) | |||||||
LFR | 67 ± 8 | 140 ± 11 | 76 ± 6 | 93 ± 6 | 89 ± 3 | 26 ± 1 | 0 |
EF | 2 ± 0 | 66 ± 8 | 30 ± 4 | 80 ± 1 | 21 ± 0 | 46 ± 2 | |
PF | 12 ± 0 | 47 ± 1 | 4 ± 1 | 21 ± 0 | 47 ± 2 | 21 ± 2 | |
EFR | 6 ± 0 | 53 ± 2 | 21 ± 4 | 37 ± 1 | 54 ± 8 | 32 ± 1 | |