| Formula | Reference |
Percentage of Sodium |
| [15] |
Kelly’s Ratio |
| [16] |
Magnesium Adsorption Ratio |
| [17] |
Total Hardness |
| [18] |
Residual Sodium Carbonate |
| [19] |
Sodium Adsorption Ratio |
| [20] |
Permeability Index |
| [21] [25] |
Water Quality Index |
| [22] |