INFILTRATION Infiltration in geology refers to the process by which water on the ground surface enters the soil or rock layers beneath. It is an essential part of the hydrological cycle, as it controls groundwater recharge, soil moisture balance, and the movement of water into aquifers. PROCESS OF INFILTRATION When precipitation falls on the Earth's surface, part of it runs off into rivers and streams, while another portion seeps downward into the soil. This downward movement of water into the p