The upper level of this saturated layer of an unconfined aquifer is called the water table or phreatic surface.Below the water table,where generally all pore spaces are saturated with water is the phreatic zone. Ground surface Vadose Zone Capillary Fringe Water table Phreatic Zone The upper level of this saturated layer of an unconfined aquifer is called the water table or phreatic surface. Below the water table, where generally all pore spaces are saturated with water is the phreatic zone. Ground surface hc Vadose Zone CapillaryFringe Phreatic Zone Water table