groundwater recharge

References

groundwater recharge

hydrology

Written by

The Information Architects of Encyclopaedia Britannica

Last updated

June 29, 2026

Quick Summary

Groundwater recharge is the process by which water moves downward through the soil and rock layers to replenish aquifers. Aquifers are underground rock layers that hold and release water, serving as crucial sources of fresh water on Earth.12

Recharge occurs most effectively when rainfall exceeds water loss through evaporation and transpiration. If the water table is deep, aquifer water can be ancient, originating from past climates. This is known as groundwater mining when the water is used without sufficient replenishment, as seen in the Ogallala Aquifer.13

Over-extraction of groundwater can lead to falling water tables, increased pumping costs, and saltwater intrusion into coastal aquifers. Efforts to augment recharge include using wastewater and managing river flows.23

Summary created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

3 Britannica Sources

Ask Britannica AI about this topic

Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.

aquifer
Recharge
…drainage is referred to as groundwater recharge. Rates of groundwater recharge are greatest when rainfall inputs to the soil exceed evapotranspiration losses. When the water table is deep underground, the water of the aquifer may be exceedingly old, possibly a result of a past climatic regime. A good example is…
Read More
…drainage is referred to as groundwater recharge. Rates of groundwater recharge are greatest when rainfall inputs to the soil exceed evapotranspiration losses. When the water table is deep underground, the water of the aquifer may be exceedingly old, possibly a result of a past climatic regime. A good example is…
Read More

hydrologic sciences
Groundwater
…drainage is referred to as groundwater recharge. Rates of groundwater recharge are greatest when rainfall inputs to the soil exceed evapotranspiration losses. When the water table is deep underground, the water of the aquifer may be exceedingly old, possibly resulting from a past climatic regime. A good example is the…
Read More
…drainage is referred to as groundwater recharge. Rates of groundwater recharge are greatest when rainfall inputs to the soil exceed evapotranspiration losses. When the water table is deep underground, the water of the aquifer may be exceedingly old, possibly resulting from a past climatic regime. A good example is the…
Read More

irrigation
Water supply
…pumping and the rate of recharge of the aquifer. Often the only way for the engineer to obtain these data reliably is to drill test wells and make on-site measurements. Ideally, a project is planned so as not to use more subsurface water than is recharged. Otherwise, the water is…
Read More
…pumping and the rate of recharge of the aquifer. Often the only way for the engineer to obtain these data reliably is to drill test wells and make on-site measurements. Ideally, a project is planned so as not to use more subsurface water than is recharged. Otherwise, the water is…
Read More

groundwater
…groundwater supply is known as recharge. In general, recharge occurs only during the rainy season in tropical climates or during winter in temperate climates. Typically, 10 to 20 percent of the precipitation that falls to the Earth enters water-bearing strata, which are known as aquifers.
Read More
…groundwater supply is known as recharge. In general, recharge occurs only during the rainy season in tropical climates or during winter in temperate climates. Typically, 10 to 20 percent of the precipitation that falls to the Earth enters water-bearing strata, which are known as aquifers.
Read More