| CRITERION | CLASSE | WEIGHT |
G | Type of aquifer depending on its degree of containment Ca, | Free wthout cover | 1.0 |
O | The lithology of the aquifer Cl | Gravel, chalky limestones | 0.8 |
Sand and gravel, sandstone, tuffs | 0.7 | ||
Clay | 0.6 | ||
Alluvial silts | 0.5 | ||
Residual soil | 0.4 | ||
D | The depth of the water table Cd | <2 | 1 |
2 - 5 | 0.9 | ||
5 -10 | 0.8 | ||
10 - 20 | 0.7 | ||
20 - 50 | 0.6 | ||
5 - 100 | 0.5 | ||
>100 | 0.4 |