Geochemical characteristics of groundwater and brine are related to chemical species along with the groundwater flow path. For major cations, groundwater indicates mainly sodium and calcium ions which are affected by cation exchange along the flow line. The chemical reaction occurs during fresh and salt water displacement. However, brine presents dominantly sodium and potassium ions. For major anions, bicarbonate of groundwater and chloride of brine are dominant ion. The salinity zone of sodium chloride is confined only in the small area. Besides, the influence of rock salt in some areas is concerning. Speciation of chemical species brings about the water type which the relationship of No+ and Cl- proves their stoichiometric balance. Chemical phases from the saturation indices consist of anhydrite, calcite, dolomite, and gypsum, which are found most in every sample. Moreover, mostly groundwater expresses the under saturation state. Moreover, saturation indices of brine present the super saturation for anhydrite. Flow direction and sampling point can indicate the salt effects combined with groundwater. Groundwater flows from the southern highland to the west-eastern lowland. The lowland is located as the salt evaporation field. The Visual MODFLOW computer software program is useful for creating the hydrogeological cross-section model. High hydraulic head in the west of salt dome is the recharge area where presents the high flow velocity of total dissolved solids. However, nearby the salt dome indicates its lower flow velocity because of high density of brine.

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