Application of Stable Isotope Technique in Estimating of Groundwater Mixing in Al-Najaf - Ain - A l-Tamur Area

Hydrochemistry and stable isotopic technique were used in studying the groundwater mixing in Al-Najaf-Ain-Al-Tamur area. Twenty one shallow and deep wells were chosen for hydrochemical and isotopic (2H and 18O) analyses in addition to spring, Razzaza Lake and rainwater. diagram between 18O, and D was plotted then the result showed that groundwater samples separated into two groups, one for Dammam aquifer which underwent less evaporation or may be fed with rain water that is enriched with stable isotopes, the other group belongs to Dibdibba aquifer including Razaza lake which have been underwent more evaporation.