Table 3:
Mean (±SE) values of physical parameters of the rivers in the GJFR, Kedah.
| Physical parameters | River | ||
|---|---|---|---|
|
| |||
| Tupah | Batu Hampar | Teroi | |
| Altitude (a.s.l.) | 200 | 300 | 1214 |
| Width (m) | 4.14±0.28 | 4.73±0.38 | 4.03±0.73 |
| Depth (m) | 0.32±0.05 | 0.34±0.06 | 0.17±0.07 |
| Water acidity (pH) | 6.02±0.12 | 6.06±0.11 | 4.97±0.21 |
| Water temperature (°C) | 24.4±0.28 | 24.2±0.19 | 20.9±0.28 |
| Water velocity (m/s) | 0.56±0.16 | 0.65±0.13 | 1.22±0.12 |
| DO (mg/l) | 7.53±0.22 | 7.14±0.37 | 7.67±0.33 |
| BOD (mg/l) | 1.93±0.07 | 0.95±0.18 | 0.84±0.18 |
| COD (mg/l) | 10.25±0.23 | 10.32±1.91 | 19.15±3.15 |
| NH3-N (mg/l) | 0.02±0.01 | 0.03±0.01 | 0.04±0.04 |
| TSS (mg/l) | 2.85±0.23 | 1.46±0.31 | 5.23±0.21 |