Abstract
Stable hydrogen and oxygen isotopes were used as natural tracers to identify spatial-temporal control on groundwater wells recharge and basic physico-chemical parameters between lower Zab and Tigris river South of AlShirqat city-Iraq. the search aimed to study the relationships in isotope compositions to evaluate the source of groundwater recharge. Seven wells water samples were analyzed for stable isotopes for two periods, (dry and wet), 2021. There is a special and temporal variations in the distribution of δD and δ 18O values in the studied area, the δD values are distributed from -39.4 to -16.2 ‰, and from -42.2 to -18.14 ‰ in dry and wet periods, respectively, while the δ 18O values are distributed from -7 to -2.83 ‰, and from -7.26 to -3.08 ‰ in dry and wet periods, respectively. The data suggest that the groundwater is sourced mainly from local meteoric water line of Iraq (LMWL) with some interaction between lower Zab and Tigris river.
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