| Level | Volume (106 m3) | ||
| Ghrib | Deurdeur | Harreza(*) | |
| Maximal Volume | 200 | 165 | 90 |
| Spillway Level | 155 | 115 | 70 |
| Minimal Exploitation Level | 40 | 25 | 20 |
| Level at Start of Simulation | 155 | 25 | 20 |