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Table 1 Hydraulic features of the different aquifer systems

From: Groundwater age and hydrothermalism of confined aquifers in the Argentine Pampean plain

Hydraulic occurrence

 

Depth (m)

Hydraulic conductivity (K) (m/d)

Effective porosity (ep) (%)

Hydraulic gradients (%)

Groundwater velocity (m/d)

Unconfined aquifer

 

Up to 75–100

1–5

5–10

0.2–0.3

0.04–0.2

Confined aquifer systems

A1 CAS

120–200

2–8

15–20

0.2–0.3

0.03–0.12

A2 CAS

225–350

5–10

20–30

0.1–0.3

0.025–0.1