| Rivers/gaging stations | Probability distribution | Parameter estimation method | Homogenous groups |
| Amen | Weibul | PWM | Group-1 |
| Anger_greater | |||
| Anger_lower | |||
| Gilgel Beles | |||
| Gilgel Abay | |||
| Indrias | |||
| Mendel | |||
| Neshi | |||
| Siblu | |||
| Urgessa | |||
| Andassa | Log Normal (LGN) | PWM | Group-2 |
| Gulda | |||
| Hora | Generalized Extreme Value (GEV) | PWM | Group-3 |
| Mugher | |||
| Chemoga |