Ionic Ratios Consideration and Salinity Sources of Springsin Marun Dam Basin

Abstract:
      In general, water salinity sources consist of two main groups as natural and anthropogenic. In Marun dam basin, the groundwater salinity refers to the Gachsaran formation and unknown source, which on the basis of ionic ratios, the later factor could be oil-field brine contamination. Consideration of ionic ratios variations can be used for making judgments about formational salinity sources. With respect to the molar ratio of , evaporate beds springs are more constant rather than carbonate springs, and detrital beds springs have increasing trend from dry to wet months and the same trend is observed in the molar ratio of . In the same period, the weight ratio of , variations separate carbonate and detrital from evaporate based springs and moreover, the molar ratio of separate carbonate and non-carbonate springs. From the two existing data series, consideration of linear regression equations of , versus , shows that in contrast of the wet month, the dry month has more contents of Ca and Mg rather than HCO3 and SO4.