Table 2 Weightage of hazard map factors
Themes | Weightage | Individual class/features | Rank/Value for individual entity | Weightage* rank assigned |
|---|---|---|---|---|
Geology | 0.15 | Metamorphics | 1 | 0.15 |
Gabbros | 2 | 0.30 | ||
Chert/Limestone Facies | 3 | 0.45 | ||
Gabbros and Ultrabasics | 4 | 0.60 | ||
Fluviatile Deposits | 5 | 0.75 | ||
Ultrabasics-Peridotite | 6 | 0.90 | ||
Soil | 0.10 | Torrifluvents, torriorthents and rock outcrops | 1 | 0.10 |
Rock-outcrops, torripsamments and calciorthids | 2 | 0.20 | ||
Slope (in percentage) | 0.15 | Low (0–30) | 1 | 0.15 |
Medium (30–60) | 2 | 0.30 | ||
High (>60) | 3 | 0.45 | ||
Land Use | 0.10 | Green Areas | 1 | 0.10 |
Waterbodies | 2 | 0.20 | ||
Rock-outcrop, dunes and crushers | 3 | 0.30 | ||
Oil Tank | 4 | 0.40 | ||
Built-up | 5 | 0.50 | ||
Earthquake Historical Events | 0.25 | 20 km | 1 | 0.25 |
10 km | 2 | 0.50 | ||
5 km | 3 | 0.75 | ||
3 km | 4 | 1.00 | ||
Fault line (km) | 0.20 | 10-30 | 1 | 0.20 |
5-10 | 2 | 0.40 | ||
2-5 | 3 | 0.60 | ||
<2 | 4 | 0.80 | ||
Road (m) | 0.05 | 1500 | 1 | 0.05 |
1000 | 2 | 0.10 | ||
500 | 3 | 0.15 |