Table 2.
Statistical properties of the investigated parameters in water resources of Siwa Oasis.
| Parameters | Min | Max | Mean | SD |
|---|---|---|---|---|
| pH | 6.8 | 8.7 | 7.9 | 0.3 |
| TDS | 1120 | 153,589 | 9834.1 | 20,701.9 |
| K + | 3.5 | 83 | 42.8 | 18.5 |
| Na + | 192 | 39,500 | 2240.9 | 5531.6 |
| Mg2 + | 9 | 12,216.6 | 676.6 | 1388.8 |
| Ca2 + | 19.6 | 2508.8 | 366.5 | 401 |
| Cl− | 580 | 94,250 | 5933.9 | 13,042.3 |
| SO42− | 5 | 5348.7 | 486.6 | 652.4 |
| HCO3− | 83.7 | 328.8 | 166.7 | 36.5 |
| CO32− | 0 | 35.3 | 6.2 | 8.8 |
| Cd | 0.002 | 0.19 | 0.04 | 0.03 |
| Cr | 0.0015 | 12.3 | 0.6 | 1.63 |
| Cu | 0.002 | 15.6 | 1.14 | 3.004 |
| Fe | 0.003 | 36.2 | 2.16 | 5.35 |
| Mn | 0.0002 | 3.37 | 0.28 | 0.68 |
| Ni | 0.0001 | 0.72 | 0.1 | 0.12 |
| Pb | 0.002 | 2.23 | 0.33 | 0.34 |
| Zn | 0.0002 | 0.1 | 0.03 | 0.024 |
The units of all chemical parameters were measured in mg/L except pH.