The water that is found below the surface of the earth is known as underground water or groundwater and the source ( device) containing the groundwater is known as underground water or ground sources of water.
The quality of groundwater is generally good due to natural filtration as it percolates then infiltrate deeper strata.
The various forms of ground sources are as follows:
- Gravity (depression, surface, artesian)
- Infiltration galleries
- Infiltration wells
- Wells and tube wells
- Open/ dug/ draw well (shallow and dip)
- Tube well (shallow and deep) Strainer, cavity pipe, slotted, perforated
- Artesian well