Determining of the salinity sources in Garu springs and Asmari Anticline by using hydrochemical parameters

The salinity of fresh water is one of the serious contamination threat of groundwater in many countries. Garu Spring in the East of Khuzestan province is one of the salty springs in the Zagros zone. Based on field investigations, possible sources of salinity in the region include dissolution of Gachsaran evaporative formation and oilfield brines. To identify the source of salinization in study area, in February and September 2015, 20 samples In order to determine the main elements, and 17 samples to determine Br, were collected from groundwater and surface water resources, and subsequently analyzed. Finally combination diagrams of bicarbonate against calcium, magnesium, sodium, sulfate, and the ratio Br / Cl and TDI against chlorine, were used as the best way to separating various origins of the salinity in the area. The results show that the main reason for salinity in the wet season is influx of high volume of Temby river water, and in the dry season is mixing with oil brines.