| Variables | Data Time Scale | ZMK | p-value | slope (m) | Result of trend test | |
| α = 5% | α = 10% | |||||
| Temperature at Korhogo Synoptic Station | Annual rainfall | 2.97 | 0.00 | 0.00 | Increase | Increase |
| Dry season (November-April) | 4.28 | 0.00 | 0.00 | Increase | Increase | |
| November | 0.87 | 0.38 | 0.00 | No trend | No trend | |
| December | 4.13 | 0.00 | 0.03 | Increase | Increase | |
| January | 4.74 | 0.00 | 0.05 | Increase | Increase | |
| February | 4.31 | 0.00 | 0.04 | Increase | Increase | |
| March | 4.37 | 0.00 | 0.03 | Increase | Increase | |
| April | 2.56 | 0.01 | 0.00 | Increase | Increase | |
| Potential Evapotranspiration at Korhogo Synoptic Station | Annual rainfall | 2.74 | 0.00 | 0.01 | Increase | Increase |
| Dry season (November-April) | 4.54 | 0.00 | 0.10 | Increase | Increase | |
| November | 0.78 | 0.43 | 0.00 | No trend | No trend | |
| December | 3.97 | 0.00 | 0.63 | Increase | Increase | |
| January | 4.30 | 0.00 | 0.89 | Increase | Increase | |
| February | 4.26 | 0.00 | 0.96 | Increase | Increase | |
| March | 4.42 | 0.00 | 0.88 | Increase | Increase | |
| April | 2.62 | 0.00 | 0.40 | Increase | Increase | |
| Discharge at Badikaha Hydrometric Station | Annual rainfall | −8.98 | 0.00 | −0.20 | Decline | Decline |
| Rainy season (May-October) | −5.53 | 0.00 | −0.03 | Decline | Decline | |
| May | −3.50 | 0.00 | −0.18 | Decline | Decline | |
| June | −3.26 | 0.00 | −0.40 | Decline | Decline | |
| July | −3.49 | 0.00 | −1.21 | Decline | Decline | |
| August | −4.32 | 0.00 | −5.45 | Decline | Decline | |
| September | −4.48 | 0.00 | −10.85 | Decline | Decline | |
| October | −5.16 | 0.00 | −12.02 | Decline | Decline | |