Although unknown to many, it is no secret that much of the world’s water sources from aquifers beneath the soil. Thanks to UNESCO’s World-wide Hydrogeological Mapping and Assessment Programme (WHYMAP) visualizing the supply no longer requires an expert’s eye. WHYMAP’s newest graphic is a colorful global groundwater map, showing transboundary aquifers across the world. The map displays a wealth of hitherto incoherent data useful for a planet short on water.

Read more here and here.

Source: WHYMAP, WaterWired