Groundwater quality assessment of Dehroud and Tang Eram regions of Dashtestan using Water Quality Index (WQI)

Groundwater quality assessment can be very important in managing these resources and planning for the future. This research aims to monitor the groundwater quality of the Dehroud-Tange Eram plain in Bushehr province in southern Iran using the water quality index (WQI). Therefore, 10 groundwater sources in the plain have been selected and their water quality has been measured from the years 2013 to 2020 in two seasons, dry and wet. The water quality index has been calculated using pH, TDS, total hardness, nitrate, sulfate, bicarbonate, chloride, calcium, sodium, potassium and magnesium. The results of the study showed that the best water quality index with an average of 142 belongs to well number 5 (close to Tange Eram village) and the worst water quality index with an average of 789 belongs to well number 10 (near Dehroud village). A comparison of zoning maps drawn using the Kriging method shows that wells near Tange Eram have better quality. As we move towards the village of Dehroud in the southeast of the aquifer, the quality of groundwater has decreased.