| River | Catchment area S, km2 | Length of the main river L, km | Average slope of the river I | Concentration time tc | Reference | ||
| m/m | % | Calculated by (11) Hour or (Hour: min) | Observed (Hour: min) | ||||
| RDAT | 569 | 50 | 0.032 | 3.2 | 6.7 (6 h 42 min) | 5 h 30 min | [2] |
| RHERAYA | 225 | 32 | 0.072 | 7.2 | 4.8 (4 h 48 min) | 4 h 30 min | |
| N’FIS | 1270 | 82 | 0.025 | 2.5 | 8.7 (8 h 42 min) | 8 h 30 min | |
| OURIKA | 503 | 45.5 | 0.069 | 6.9 | 5.9 (5 h 54 min) | 5 h 00 min | |
| ZAT | 528 | 55 | 0.048 | 4.8 | 6.4 (6 h 24 min) | 6 h 00 min | |