Impact of the vadose zone map indicates the level of influence of the geological layers above the groundwater level. It is expressed as an index value, according to DRASTIC ranges from 1 to 10, being 1 the areas with confining layers and 10 areas with karst limestone layers.

Hydraulic conductivity map expressed as an index value, according to DRASTIC ranges from 1 to 10, being 10 the high permeability aquifers (> 1.0*10-2 m/s) and 1 the low permeability aquifers (< 5.0*10-7 m/s).

Vulnerability assessment using DRASTIC (Aller et al., 1987) and COP methods

Vulnerability assessment output map using DRASTIC method (Aller et al., 1987)

Type of aquifer media distribution map expressed as an index value according to DRASTIC ranges from 1 to 10. The highest values correspond mainly to unconsolidated detrital and karstified aquifers. The lowest values correspond to loam formations and other low permeability geological units.