Table 4 Scar area, sediment mass and generation rate, sediment load and assumed sediment delivery ratio for each of the four slope failure types
Characteristic | Failure type | Total | |||
|---|---|---|---|---|---|
| Â | Debris avalanche | Soil slip | Stream bank collapse | Landing failure | Â |
Total scar area (ha) | 9.9 | 11.6 | 0.3 | 0.2 | 22.0 |
Total scar area (%) | 45.0 | 53.0 | 1.0 | 1.0 | 100.0 |
Sediment mass generated (Mt) | 0.36 | 0.14 | 0.003 | 0.003 | 0.56 |
Total sediment mass generated (%) | 71.1 | 27.8 | 0.6 | 0.5 | 100 |
Sediment generation rate (t ha−1) | 51 | 20 | 0.5 | 0.3 | 71.8 |
Scar area (ha) with connection to stream | 9 | 5.9 | 0.3 | 0.07 | 15.3 |
Assumed sediment delivery ratio (SDR) | 0.5 | 0.5 | 1.0 | 0.5 | Â |
Mass delivered as sediment load (Mt) | 0.18 | 0.07 | 0.003 | 0.001 | 0.254 |
Total mass delivered as load (%) | 71 | 28 | 0.7 | 0.3 | 100 |