Fog Harvesting as a Source of Groundwater Recharge

Fog harvesting is being explored as a possible means of groundwater recharge in the Cape Verde Islands.  The Cape Verde Archipelago is of volcanic origin with the majority of the islands featuring exptremely steep slopes.  This arid region experiences short, but intense rain events that result in a high runoff rate.  Current methods of capture of this runoff include a series of small dams to allow for surface infiltration; this method still allows for high rates of evaporation and runoff.  Due to the high percentage of fog present throughout the year at higher elevations, the use of water captured through fog harvesting, facilited by recharge using french drains, is though to be a viable source of groundwater recharge.  This method could ease potable water stress as well as serve to push back the fresh/saltwater interface that is currently encroaching on the water table.