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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