Table 1
Mean values (± SD) of environmental parameters during the dry and wet seasons in Owe, Ekona and Buea.
| Buea | Ekona | Owe | ||||
|---|---|---|---|---|---|---|
| Parameters | Dry | Wet | Dry | Wet | Dry | Wet |
| Altitude (m) | 789 ± 240 | 789 ± 240 | 274 ± 138 | 274 ± 138 | 91 ± 7 | 91 ± 7 |
| Temperature (°C) | 20.2 ± 1.6 | 17.9 ± 3.1 | 22.5 ± 0.4 | 20.1 ± 1.8 | 22.9 ± 0.4 | 15.2 ± 0.1 |
| Susp. solids (mg/L) | 7.2 ± 2.4 | 10.6 ± 5.8 | 9.6 ± 4.8 | 12.8 ± 5.2 | 7.7 ± 5.5 | 11.8 ± 2.1 |
| Turbidity (FTU) | 9.7 ± 4.9 | 16.3 ± 8 | 15 ± 5.9 | 16.9 ± 6.3 | 14.7 ± 5.8 | 11.7 ± 3.3 |
| Elec. cond. (μS/cm) | 194 ± 77 | 456 ± 404 | 300 ± 20 | 300 ± 22 | 440 ± 399 | 179 ± 48 |
| Salinity (PSU) | 0.07 ± 0.026 | 0.1 ± 0.05 | 0.15 ± 0.01 | 0.15 ± 0.01 | 0.07 ± 0.04 | 0.08 ± 0.03 |
| pH (CU) | 7.5 ± 0.3 | 6.6 ± 0.2 | 7 ± 0.4 | 6.3 ± 0.1 | 7.5 ± 0.1 | 6.6 ± 0 |
| Dissolved O2 (% sat) | 74.5 ± 5.9 | 61.6 ± 1.8 | 70.6 ± 8.5 | 61.2 ± 3.3 | 70.6 ± 3.8 | 62.7 ± 1.9 |
| Dissolved CO2 (mg/L) | 3.7 ± 2.0 | 0.3 ± 0.1 | 10.5 ± 5.4 | 0.4 ± 0.1 | 9.3 ± 7.9 | 0.2 ± 0.1 |
| Nitrate (mg/L) | 0.29 ± 0.18 | 0.48 ± 0.44 | 0.4 ± 0.27 | 0.96 ± 0.89 | 0.4 ± 0.09 | 0.83 ± 0.38 |
| Nitrite (mg/L) | 0.005 ± 0.01 | 0.032 ± 0.02 | 0.007 ± 0.01 | 0.032 ± 0.03 | 0.015 ± 0.01 | 0.043 ± 0.04 |
| Ammonium (mg/L) | 0.01 ± 0.004 | 0.003 ± 0.004 | 0.14 ± 0.39 | 0.003 ± 0.005 | 0.37 ± 0.22 | 0.004 ± 0.006 |
| Orthophosphates (mg/L) | 0.57 ± 0.19 | 1.1 ± 0.54 | 1.3 ± 0.97 | 1.85 ± 0.38 | 0.41 ± 0.06 | 0.5 ± 0.14 |
| Alkalinity (mg/L) | 5.7 ± 2.1 | 5.2 ± 1.2 | 5 ± 1.4 | 7.5 ± 5.3 | 4.7 ± 2.1 | 6.3 ± 3.2 |
| Total hardness (mg/L) | 41 ± 11 | 72 ± 49 | 35 ± 18 | 163 ± 121 | 64 ± 8 | 79 ± 72 |
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