Charge and recharge of groundwater aquifers are essentially the same process. In both situations the groundwater aquifers receive replenishing water. This water replaces the aquifer water which may not be available because of natural discharge, pumping, or gravity movement in the aquifer.
Augmentation is a process by which humans replenish the groundwater they have used.
Model the clay as an inverted saucer around the bottom tube end that projects from the pump. Model clay to provide support for the one half 2 liter bottle and place the pump system at the base end. Fill the slightly tilted one half 2 liter bottle with gravel to a depth of three centimeters. Place sand on the gravel to a depth of five centimeters. Spray a canister of water onto the bottle system.