Type of

permeable material

How the aquifer works

Possible values of the radius of influence R

Kárstico

Free

700 m - 1000 m

semi confined

1000 m - 1500 m

Captive

1500 m - 2000 m

Intergranular porous

Free

400 m - 700 m

semi confined

700 m - 900 m

Captive

900 m - 1200 m

Kárstico and porous

Free

500 m - 1000 m