Aquifers

Groundwater is water that flows or seeps downwar
The beginning of a drought is difficult to deter
The depth to the water table can change (rise or fall) depending on the time of year.
A well is said to have gone dry when water levels drop below a pump intak
A confined aquifer is an aquifer below the land surface that is saturated
Devils Hole is a tectonic cave developed in the discharge zone of a regio