Groundwater flow above deep geological repositories in salt domes may lead to the transport of radionuclides into the biosphere. To mitigate this risk, groundwater age is used as an exclusion criterion for repository site selection, and groundwater life expectancy is an established measure for radionuclide travel times. Complexities arise in computing age since groundwater flow above salt domes is highly density-dependent due...

Freshwater resources are scarce on islands surrounded by seawater, where groundwater lenses are often the only sources of fresh water. These resources are highly sensitive to climate variability and human activities, requiring specialized management approaches. Here, groundwater flow models that account for climate and parameter uncertainty are used to guide groundwater resource management on the Magdalen Islands (Quebec, Cana...

Consideration of regional groundwater flow in aquifer systems allows for solving groundwater issues on a larger scale than single aquifers and contributes to all practical aspects of the UN’s Sustainable Development Goals for water. The approach has been extended to a wide range of hydrogeological environments. However, it suffers from poorly constrained terminology and conceptualisation, compounded by the difficulties of inte...