Parameters | Weight scale (w) | Range | Rating (r) | Index scale (r * w) | |
Depth to the water table (m) | 5 | 0 - 1.5 | 10 | 50 | |
1.5 - 4.5 | 9 | 45 | |||
4.5 - 9.1 | 7 | 35 | |||
9.1 - 15.2 | 5 | 25 | |||
15.2 - 22.9 | 3 | 15 | |||
22.9 - 30.5 | 2 | 10 | |||
>30.5 | 1 | 5 | |||
Net Recharge of aquifer (mm/year) | 4 | 0 - 50.8 | 1 | 4 | |
50.8 - 101.6 | 3 | 12 | |||
101.6 - 177.8 | 6 | 24 | |||
177.8 - 254.0 | 8 | 32 | |||
>254.0 | 9 | 36 |