| Deviation of the two methods to the verification method (%) | ||
| Dam’s name | Tesl | Initial curve |
| Tildi | +0.61% | −6.48% |
| Timicha | +2.41% | ------- |
| Assgherkiss | +2.11% | −41.40% |
| Taguenza | +1.88% | −38.52% |
| Tigmi n’ait bihi | +2.37% | −17.90% |