Hydrogeology and management of freshwater lenses on atoll islands: Review of current knowledge and research needs

On atoll islands, fresh groundwater occurs as a buoyant lens-shaped body surrounded by saltwater derived from the sea, forming the main freshwater source for many island communities. A review of the state of knowledge of atoll island groundwater is overdue given their susceptibility to adverse impacts, and the task to address water access and sanitation issues within the United Nations’ Sustainable Development Goals framework before the year...