| N˚ SBV | Main Stream | Sup. (ha) | DR* | Specific Degradation | |
| Average (t/ha/an) | Total Loss (t/an) | ||||
| 1 | Tigrigra | 90,937 | 0.10 | 12.73 | 1 157 971.49 |
| 2 | Ifrane | 101,960 | 0.16 | 18.21 | 1 856 559.40 |
| 3 | Kharrouba | 79,812 | 0.58 | 43.08 | 3 437 970.86 |
| 4 | Ouchket | 32,653 | 0.15 | 7.34 | 239 795.75 |
| 5 | El Kell | 48,720 | 0.25 | 13.84 | 674 274.97 |
| 6 | Beregline | 35,326 | 0.31 | 16.64 | 587 840.54 |
| 7 | El Kour | 41,320 | 0.21 | 9.73 | 402 055.18 |
| Watershed | - | 430,728 | 0.09 | 19.40 | 8 356 468.19 |