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Description
This study examines the origin of the sources and the effect of the change in water isotope composition isotopic constituent of hydrogen (2H), oxygen (18O) and radioactive tritium (3H). The rare stable isotopes of hydrogen and oxygen (2H, 18O) which are the constituents of the water molecule (H2O) itself and the radioactive tritium (3H ) are the classical tools of isotope hydrology. The aim of this study was to determine the water isotope composition in the North West Province of South Africa. About forty borehole water samples from selected villages in the Northwest Province of South Africa was collected to investigate the relationship between stable isotopes (δ 18O and δ 2H), climate, and topography from underground water aquifers. A cavity ring-down spectroscopy analyser with laser-current-tuned cavity resonance a Picarro L2130-i was used to measure high-precision triple water-isotope ratios at the Center for Applied Radiation Science and Technology. Results show that a plot of δ2H vs δ 18O (y = 8.2423x + 13.185) gives a line which is very close to IAEA Global Meteoric Water Line, defined by the IAEA to represent global meteoric water line. The study of the origin of groundwater and groundwater recharge In hydrogeology, is often described by the composition of δ18O and δ2H. This composition in local meteoric water can be applied to trace local relative humidity, study local climate and used as a tracer of climate change.
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