Research Article
Risk Assessment of Debris Flow in Huyugou River Basin Based on Machine Learning and Mass Flow
Table 2
Evaluation factor weights and development grades.
| | Impact factors | High (IV) | Middle (III) | Low (II) | Very low (I) | RF weight |
| | River basin area | 0.2∼5 | 5∼10 | 10∼100 | >100 | 0.082375 | | Average slope of the river basin | >32 | 32∼25 | 25∼15 | <15 | 0.090375 | | Shape coefficient | <1.1 | 1.1∼1.2 | 1.2∼1.3 | >1.30 | 0.105375 | | Channel length | >10 | 10∼5.0 | 5∼1 | <1 | 0.180375 | | Longitudinal shrinking slope of the main gully | >200 | 200∼150 | 150∼100 | <100 | 0.103375 | | Relative elevation difference | >500 | 500∼300 | 300∼100 | <100 | 0.118375 | | Vegetation coverage | <10 | 10∼30 | 30∼60 | >60 | 0.080375 | | Peak flow | >10 | 10∼6.85 | 6.85∼3.36 | <3.36 | 0.239375 | | Value range | (0.75, 1) | (0.5, 0.75] | (0.25, 0.5] | (0, 0.25] | |
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