Table 1.
Physicochemical data and geographic location of the six samples collected in the Copahue volcano-Rio Agrio system.
| Site | LV | VA1 | VA2 | AS1 | CC | SA |
|---|---|---|---|---|---|---|
| Coordinates | S 37° 51′ 21′’ | S 37° 51′ 23′’ | S 37° 51′ 18′’ | S 37° 50′ 59′’ | S 37° 53′ 08′’ | S 37° 48′35′’ |
| W 71° 09′ 29′’ | W 71° 09′ 04′’ | W 71° 08′ 59′’ | W 71° 08′ 00′’ | W 71° 04′ 02′’ | W 70° 55′33′’ | |
| pH | 2.79 | 1.92 | 2.00 | 2.06 | 2.50 | 3.89 |
| T (°C) | 4.00 | 41.00 | 28.80 | 12.00 | 15.90 | 12.60 |
| Conductivity (µs/cm) | 1402.00 | 27,100.00 | 20,600.00 | 16,990.00 | 7770.00 | 350.00 |
| Eh (mV) | ND | 365.00 | 398.00 | 382.00 | 405.00 | 310.00 |
| Cl− (mg/L) | 0.70 | 5562.10 | 3771.73 | 3103.32 | 978.74 | 30.79 |
| NO₃− (mg/L) | 11.20 | 8.82 | 49.28 | 49.45 | 23.34 | 0.36 |
| SO₄²¯ (mg/L) | 78.49 | 2841.01 | 2616.18 | 2479.92 | 98.79 | 20.64 |
| Organic matter (mg/L) * | 4.23 | 8.84 | 12.78 | 23.53 | 13.22 | 2.91 |
| Ca (mg/L) | 24.38 | 565.82 | 547.06 | 418.90 | 232.58 | 13.44 |
| Na (mg/L) | 22.50 | 1050.00 | 620.00 | 480.00 | 257.00 | 14.20 |
| K (mg/L) | 2.70 | 60.00 | 41.00 | 58.00 | 25.00 | 3.60 |
| Fe (mg/L) | 55.48 | 998.41 | 780.08 | 693.06 | 241.61 | 12.92 |
| Mn (mg/L) | 1.08 | 45.71 | 29.55 | 24.83 | 11.79 | 0.48 |
* organic matter is expressed in mg/L as Chemical Oxygen Demand. ND: not determined.