confined aquifer
Sealed underground reservoir
A confined aquifer is an underground layer of water-bearing rock or sediment trapped between impermeable layers above and below.
Unlike unconfined aquifers open to the surface, confined aquifers are under pressure—water in a well drilled into one may rise above the aquifer's top, sometimes flowing freely without pumping.
The city draws its water supply from a deep confined aquifer.
- artesian wellNaturally pressurized groundwater source
- flowing wellSelf-discharging groundwater source
- permeabilityAbility to transmit fluids
- bedrockSolid stone underground
- porosityVoid space density
porous rock · caprock · sedimentary rock · stratigraphy · irrigation · transmissivity · pumping station · well drilling · deep well · fault line · sustainable yield · water supply · underground storage · groundwater · reservoir · subsurface · sandstone · hydraulic
- hydrologyrivers, streamflow, aquifers, lakes, watershed
- underground waterunderground river, underground lake, underground stream, groundwater, water table
- hydrogeologyaquifers, permeability, porosity, water table, seepage
- Aquifersgroundwater, water table, artesian wells, drawdown, freshwater
- groundwateraquifers, water table, recharge, wells, underground streams
- groundwater modelingtransmissivity, boundary conditions, finite element, drawdown, water table
hydrogeological confinement
confined aquiferunconfined aquifer
Underground water without impermeable cap