Climate-Driven Groundwater Salinisation in a Hyper-Arid Carbonate Aquifer – Integrated Hydrochemical and Geochemical Modelling from Qatar

The dataset consists of groundwater quality records from multiple sampling campaigns conducted across Qatar between 1998 and 2021. It contains 291 individual samples, each with major physicochemical parameters, pH, EC, TDS, and major ions, Ca2+, Mg2+, Na+, K+, HCO₃⁻, SO₄²⁻, Cl⁻, expressed in mg/L. It also includes the results (mineral saturation indices and speciation percentages) of the geochemical model runs conducted. The climate dataset sheet is also incorporated in this new version (v2).