Groundwater

Continuous or discontinuous geological formation, containing temporary or permanent water that can be mobilized. It consists of permeable rock (porous or fractured formation) able to provide water naturally or though exploitation (drainage, pumping).

According to the hydro-geological meaning, a water volume supplying an aquifer over a given time. Rainfalls are mainly recharging groundwater. Unconfined groundwaters are recharged rather fast at each rainfall event. The rise in water levels and rainfall events are observed on a piezometric curve.