The rating scheme reveals the ranks of effective factors and weights of their classes based on their relative impacts on flash flood hazards
| Thematic layer . | Classes . | Flash flood potentiality . | Rank . | Weight . | |
|---|---|---|---|---|---|
| Flow time (T in h) | >4 | Very high | 0.309 | 9 | 1 |
| 4–8 | High | 7 | 0.67 | ||
| 8–12 | Moderate | 5 | 0.33 | ||
| 12–16 | Low | 3 | 0.25 | ||
| 16–20 | Very low | 1 | 0 | ||
| Runoff velocity (V in m/sec) | 0.223–4.417 | Very low | 0.271 | 1 | 0 |
| 4.417–8.612 | Low | 3 | 0.25 | ||
| 8.612–12.808 | Moderate | 5 | 0.33 | ||
| 12.808–17.003 | High | 7 | 0.67 | ||
| 17.003–21.199 | Very high | 9 | 1 | ||
| Stream power index (SPI) | −13.81– − 6.05 | Very low | 0.155 | 1 | 0 |
| −6.05–1.72 | Low | 3 | 0.25 | ||
| 1.72–9.48 | Moderate | 5 | 0.33 | ||
| 9.48–17.25 | High | 7 | 0.67 | ||
| 17.25–25.011 | Very high | 9 | 1 | ||
| Runoff depth (mm) | 12.02–23.71 | Very low | 0.092 | 1 | 0 |
| 23.71–35.40 | Low | 3 | 0.25 | ||
| 35.40–47.09 | Moderate | 5 | 0.33 | ||
| 47.09–58.78 | High | 7 | 0.67 | ||
| 58.78–70.47 | Very high | 9 | 1 | ||
| Morphometric hazard index (MHI) | 2.68–4.06 | Very low | 0.071 | 1 | 0 |
| 4.06–5.45 | Low | 3 | 0.25 | ||
| 5.45–6.83 | Moderate | 5 | 0.33 | ||
| 6.83–8.21 | High | 7 | 0.67 | ||
| 8.21–9.59 | Very high | 9 | 1 | ||
| Slope (degrees) | 0–20 | Very low | 0.041 | 1 | 0 |
| 20–30 | Low | 3 | 0.25 | ||
| 30–40 | Moderate | 5 | 0.33 | ||
| 40–50 | High | 7 | 0.67 | ||
| 50–58.5 | Very high | 9 | 1 | ||
| Lithology | Quaternary and recent wadi deposits | Very low | 0.037 | 1 | 0 |
| Phanerozoic succession (lower Cretaceous and upper Cretaceous rocks) | Low | 3 | 0.25 | ||
| Phanerozoic succession (Firani group and Cambrian rocks) | Moderate | 5 | 0.33 | ||
| Precambrian metamorphic rocks | High | 7 | 0.67 | ||
| Precambrian igneous rocks | Very high | 9 | 1 | ||
| Topographic wetness index (TWI) | −6.5–0.47 | Very high | 0.023 | 9 | 1 |
| 0.47–7.30 | High | 7 | 0.67 | ||
| 7.30–14.13 | Moderate | 5 | 0.33 | ||
| 14.13–20.96 | Low | 3 | 0.25 | ||
| 20.96–27.78 | Very low | 1 | 0 | ||
| Thematic layer . | Classes . | Flash flood potentiality . | Rank . | Weight . | |
|---|---|---|---|---|---|
| Flow time (T in h) | >4 | Very high | 0.309 | 9 | 1 |
| 4–8 | High | 7 | 0.67 | ||
| 8–12 | Moderate | 5 | 0.33 | ||
| 12–16 | Low | 3 | 0.25 | ||
| 16–20 | Very low | 1 | 0 | ||
| Runoff velocity (V in m/sec) | 0.223–4.417 | Very low | 0.271 | 1 | 0 |
| 4.417–8.612 | Low | 3 | 0.25 | ||
| 8.612–12.808 | Moderate | 5 | 0.33 | ||
| 12.808–17.003 | High | 7 | 0.67 | ||
| 17.003–21.199 | Very high | 9 | 1 | ||
| Stream power index (SPI) | −13.81– − 6.05 | Very low | 0.155 | 1 | 0 |
| −6.05–1.72 | Low | 3 | 0.25 | ||
| 1.72–9.48 | Moderate | 5 | 0.33 | ||
| 9.48–17.25 | High | 7 | 0.67 | ||
| 17.25–25.011 | Very high | 9 | 1 | ||
| Runoff depth (mm) | 12.02–23.71 | Very low | 0.092 | 1 | 0 |
| 23.71–35.40 | Low | 3 | 0.25 | ||
| 35.40–47.09 | Moderate | 5 | 0.33 | ||
| 47.09–58.78 | High | 7 | 0.67 | ||
| 58.78–70.47 | Very high | 9 | 1 | ||
| Morphometric hazard index (MHI) | 2.68–4.06 | Very low | 0.071 | 1 | 0 |
| 4.06–5.45 | Low | 3 | 0.25 | ||
| 5.45–6.83 | Moderate | 5 | 0.33 | ||
| 6.83–8.21 | High | 7 | 0.67 | ||
| 8.21–9.59 | Very high | 9 | 1 | ||
| Slope (degrees) | 0–20 | Very low | 0.041 | 1 | 0 |
| 20–30 | Low | 3 | 0.25 | ||
| 30–40 | Moderate | 5 | 0.33 | ||
| 40–50 | High | 7 | 0.67 | ||
| 50–58.5 | Very high | 9 | 1 | ||
| Lithology | Quaternary and recent wadi deposits | Very low | 0.037 | 1 | 0 |
| Phanerozoic succession (lower Cretaceous and upper Cretaceous rocks) | Low | 3 | 0.25 | ||
| Phanerozoic succession (Firani group and Cambrian rocks) | Moderate | 5 | 0.33 | ||
| Precambrian metamorphic rocks | High | 7 | 0.67 | ||
| Precambrian igneous rocks | Very high | 9 | 1 | ||
| Topographic wetness index (TWI) | −6.5–0.47 | Very high | 0.023 | 9 | 1 |
| 0.47–7.30 | High | 7 | 0.67 | ||
| 7.30–14.13 | Moderate | 5 | 0.33 | ||
| 14.13–20.96 | Low | 3 | 0.25 | ||
| 20.96–27.78 | Very low | 1 | 0 | ||