| sf-sub-factor | sv-sub-factor | |||
| Geological unit | sf-value | Slope% | Vegetation | sv-value |
| Balambo Fn. | 0.75 | ≤8 | --- | 0.75 |
| Qulqula group | 0.75 | >8 - 31 | Low | 0.85 |
| Recent deposits | 1 | >31 - 76 | Low | 0.95 |
| Avroman Fn. | 0.75 | >76 | --- | 1 |
| Tanjero Fn. | 1 |
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| Shiranish Fn. | 1 |
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| Jurassic formations | 0.75 |
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