Table 1 descriptive statistics of all groundwater quality parameters for modeling the salinity using three hybrid ANFIS models and the Lasso-Reg approach.
Variables | Minimum | Maximum | Mean | Std. D | COV (%) | Skewness | Kurtosis |
|---|---|---|---|---|---|---|---|
Depth (m) | 18 | 336 | 113.1 | 62.84 | 55.56 | 1.957 | 3.141 |
pH | 6.2 | 8.8 | 7.336 | 0.4449 | 6.065 | 0.0911 | 0.943 |
Ca2+ (mg/l) | 0.2511 | 902.4 | 89.82 | 111 | 123.6 | 3.479 | 17.15 |
Mg2+ (mg/l) | 0.0681 | 718.9 | 107.1 | 131.6 | 122.9 | 1.889 | 3.419 |
Na+ (mg/l) | 0.2 | 4211 | 722.5 | 836.8 | 115.8 | 1.295 | 0.789 |
K+ (mg/l) | 0.252 | 176.8 | 10.33 | 16.38 | 158.5 | 5.806 | 43.54 |
HCO3− (mg/l) | 24.4 | 823.5 | 221.7 | 119.3 | 53.81 | 1.123 | 1.91 |
SO42−(mg/l) | 0 | 2926 | 22.87 | 141.1 | 617.2 | 16.9 | 336 |
PO4−2 (mg/l) | 0.03 | 57.7 | 1.359 | 3.498 | 257.4 | 10.34 | 142.6 |
Cl− (mg/l) | 2.1 | 16,250 | 2054 | 2713 | 132.1 | 1.928 | 4.64 |
Salinity (ppt) | 0 | 25.5 | 3.05 | 3.661 | 120.0 | 1.769 | 4.073 |
