A well recharge pushes back surface water into the groundwater system. Usually, a well recharge is one metre in diameter and six metres deep, lined with concrete rings having perforations. These perforations let water seep from the sides. The rings line the well recharge from bottom to top with a steel or concrete ring closing it. Rainwater that goes down terrace drains, and surface water flowing in storm water drains, can be filtered, de-silted and recharged in open wells.\
It is usually complemented by an aquifer which is an underground layer of water-bearing permeable rock or unconsolidated material such as sand, gravel, or silt. A well recharge helps to increase the groundwater level.