Table 2 Selected scenarios of candidate input components for modeling the salinity of groundwater obtained via Burota-random forest feature selection.

C 1

Cl^- (mg/l), Mg²⁺ (mg/l), Na⁺ (mg/l)

3

C 2

PH, Ca²⁺ (mg/l), Cl^- (mg/l), Mg²⁺ (mg/l), Na⁺ (mg/l), K⁺ (mg/l)

6

C 3

Depth (m), PH, Ca²⁺ (mg/l), Cl⁻ (mg/l), Mg²⁺ (mg/l), Na⁺ (mg/l), K⁺ (mg/l)

7

C 4

Depth (m), PH, Ca²⁺ (mg/l), Cl⁻ (mg/l), Mg²⁺ (mg/l), Na⁺ (mg/l), K⁺ (mg/l), HCO₃⁻ (mg/l)

8