As used in this act, "aquifer recharge area" means an area which may be composed of sand or gravel, may be located at points of substantial fracturing in geological formations, may extend to the ground surface in certain locations, and which transmits water to an aquifer under the influence of vertical head differentials and refills or "recharges" primarily by infiltration of precipitation through the ground surface.
N.J.S. § 58:11A-12