aquifer
underground water-bearing layer
A layer of rock, sand, or gravel under the ground that holds water and can supply wells or springs.
an aquifer; [water] from an aquifer; [an aquifer] beneath [place]
- The town draws most of its drinking water from a shallow aquifer beneath the valley.
- Heavy pumping for irrigation has lowered the water level in the aquifer.
- Chemicals from the site could seep into the soil and contaminate the aquifer.
- The well gets water from an aquifer.
- An aquifer lies under the ground.
- Base: aquifer
- Plural: aquifers
aquifer contamination
1pollution of an aquifer
Pollution that makes water in an aquifer unsafe or lower in quality.
- Officials found evidence of aquifer contamination near the old industrial site.
- Proper waste disposal helps prevent aquifer contamination.
- Saltwater intrusion can cause aquifer contamination in coastal areas.
aquifer depletion
1loss of groundwater storage
The loss of water from an aquifer, often because people pump out too much water.
- Aquifer depletion is a major concern in regions that depend on irrigation.
- Decades of pumping have led to serious aquifer depletion under the plains.
- New water rules aim to slow aquifer depletion and protect local wells.
aquifer recharge
1refilling an aquifer
The process of adding water back into an aquifer.
- The city is testing aquifer recharge by directing stormwater into spreading basins.
- Wet winters can increase aquifer recharge after years of drought.
- Managed aquifer recharge is used to store excess water underground.
aquifer storage and recovery
1storing and retrieving groundwater
A system that puts water into an aquifer and takes it out later when needed.
- The utility is considering aquifer storage and recovery to prepare for dry years.
- In an aquifer storage and recovery system, treated water is injected underground and recovered later.
- The success of aquifer storage and recovery depends on local geology and water quality.
artesian aquifer
1pressurized aquifer feeding wells
A pressurized aquifer that can make water rise in a well by itself.
- The farm's flowing well is supplied by an artesian aquifer.
- Drillers reached an artesian aquifer, and water rose quickly in the well casing.
- The pressure in the artesian aquifer has declined after years of pumping.
confined aquifer
1pressurized enclosed aquifer
An aquifer sealed between layers of rock or clay, with water under pressure.
- The well taps a confined aquifer more than 200 meters below the surface.
- Water in a confined aquifer may rise in a well because it is under pressure.
- Engineers mapped the clay layer above the confined aquifer.
fossil aquifer
1ancient slowly renewed aquifer
An aquifer with very old water that is not replaced quickly.
- Some desert cities rely on water pumped from fossil aquifers.
- Using a fossil aquifer is often like mining a nonrenewable resource.
- The study estimated the age of groundwater in the fossil aquifer.
unconfined aquifer
1aquifer open to surface recharge
An aquifer that can be refilled directly by water moving down from the surface.
- A shallow unconfined aquifer can be vulnerable to pollution from the surface.
- Rainfall quickly recharges the unconfined aquifer beneath the fields.
- The water table forms the top of an unconfined aquifer.