Table 2 Mean values of seasonal water quality indicators in the Kebena watershed
From: Assessing the impact of watershed land use on Kebena river water quality in Addis Ababa, Ethiopia
Variable | Season | t-Value | P-Value | |
|---|---|---|---|---|
Wet | Dry | |||
PH | 6.23 | 7.87 | − 14.609 | 0.000** |
Total Dissolved Solid (TDS) mg/l | 255.00 | 900.00 | − 35.514 | 0.000** |
Total Suspended Solid (TSS) mg/l | 101.38 | 156.00 | − 2.242 | 0.030* |
Electrical Conductivity (EC) µs/cm | 444.50 | 1801.19 | − 35.362 | 0.000** |
Ammonia, mg/l | 6.63 | 84.29 | − 12.218 | 0.000** |
Total Nitrogen (TN), mg/l | 6.30 | 75.86 | − 10.758 | 0.000** |
Total Phosphorus (TP), mg/l | .55 | 8.24 | − 6.987 | 0.000** |
Chloride, mg/l | 51.92 | 87.71 | − 10.443 | 0.000** |
Chemical Oxygen Demand, (COD), mg/l | 63.00 | 99.73 | − 3.354 | 0.001** |
Biological Oxygen Demand, (BOD), mg/l | 25.28 | 64.63 | − 3.356 | 0.002** |