Potential salinity (PS)
It is defined as the sum of chloride and half of the sulphate ion concentration in groundwater (Ahmed et al., 2020). In the study area, PS ranges from 0.86 to 28.07 meq/L with a mean of 9.01 meq/L. About 23.33 % of groundwater samples are found to be less than 5, 43.33 % of samples are found to be marginal and 33.33 % of samples are found to be unsuitable for irrigation uses (Table.6). The spatial distribution of PS observed that 33.45 sq.km is suitable, 377.56 sq.km is marginal, and 255.93 sq.km is injurious to unsatisfactory (Fig.11f).