| River/Gaging station | Kendall’s tau | S | Var(S) | p-value (two-tailed) | Sen’s Slope |
| Amen | −0.494 | −38 | 266.67 | 0.023 | −2E−4 |
| Andassa | −0.559 | −50 | 330.00 | 0.007 | −0.033 |
| Anger-greater | −0.556 | −25 | 0.00 | 0.029 | −1.584 |
| Anger-lower | 0.595 | 91 | 0.00 | 0.000 | 0.288 |
| Chemoga | −0.513 | −40 | 0.00 | 0.015 | −0.007 |
| Gilgel Abay | −0.604 | −180 | 1829.33 | 0.0001 | −0.062 |
| Gilgel Belles | 0.336 | 85 | 0.00 | 0.026 | 0.023 |
| Gulda | −0.566 | −397 | 6325.00 | 0.0001 | −0.005 |
| Hoha | 0.322 | 203 | 5389.00 | 0.006 | 0.006 |
| Indrias | −0.446 | −68 | 696.00 | 0.011 | −0.007 |
| Mendel | −0.433 | −52 | 0.00 | 0.020 | −0.003 |
| Mugher | −0.275 | −95 | 2289.67 | 0.049 | −0.003 |
| Neshi | −0.744 | −58 | 0.00 | 0.000 | −0.024 |
| Siblu | −0.418 | −84 | 1064.67 | 0.011 | −0.002 |
| Urgessa | 0.325 | 68 | 1094.67 | 0.043 | 0.003 |