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Apparent groundwater age dating has been both efficient and robust in determining water source and mixing processes, especially when multiple tracers are used. Despite being widely used, age tracers have not been widely used in the general practice of flow and transport model calibration, which has been relatively new. This knowledge is vital as part of the safety and feasibility studies for the underlying Boom Clay Formation, which has been regarded as a potential source rock for radioactive waste disposal by geological means. In several groundwater samples, the coexistence of 3H, 14C, and 4He indicates that mixing of groundwater with young and old fractions occurs mainly in the central part of the aquifer, as shown by the coexistence of 3H, 14C, and 4He. Particle time measurements show an acceptable deal with apparent ages derived from age tracers for young and old groundwater. Groundwater with ages ranging from 100 to 1,000 years is most likely a mixture of water with young/old fractions, resulting in the largest discrepancies between advective model ages and age tracer based on apparent ages. We distinguish between three groundwater drain systems in the Neogene aquifer based on our results; i a shallow/local flow system with groundwater originating from modern meteoric water; ii a deep/semi-regional flow system with old groundwater; i a deep/semi-regional flow system in which the presence of 4Herad is present; ii a complex zone of groundwater flow, where the newly in ad a ad a aquifer aquifer's; aquifer a aquifer ad a; a a; ad a, where the presence of old groundwater a; aquifer a; ad; ad aquiferta aquifer-water aphiemi a ad hetrained meteoric waterways;.
Source link: https://doi.org/10.1016/j.hydroa.2022.100132
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