From: A model to assess tephra clean-up requirements in urban environments
Scenario | Surfaces cleaned | Area impacted (km2) | Tephra volume removed (m3) | |||
---|---|---|---|---|---|---|
Roads | Roofs | Other impervious surfaces | Vegetated areas | |||
Thin distal | √ |  |  |  | 808 | 3.6 × 104 |
Thick distal | √ | √ | √ |  | 808 | 2.2 × 106 |
L1 | ||||||
Z1 | √ |  |  |  | 65 | 1.3 × 104 |
Z2 | √ | √ | √ |  | 69 | 3.1 × 105 |
Z3 | √ | √ | √ | √ | 12 | 8.6 × 105 |
Z4 | √ | √ | √ | √ | 58 | 5.9 × 107 |
L2 | ||||||
Z1 | √ |  |  |  | 56 | 1.5 × 104 |
Z2 | √ | √ | √ |  | 17 | 9.6 × 104 |
Z3 | √ | √ | √ | √ | 13 | 1.3 × 106 |
Z4 | √ | √ | √ | √ | 12 | 6.8 × 106 |