To accurately identify groundwater, its depth, quantity, and quality, several techniques and tests must be used to analyze an area’s hydrologic and geologic features. Geophysical surveying is used to determine the dimensions, position, and physical structure of beds, as well as their physical properties. A hydrogeological survey is done to gauge the underground water level. This kind of surveying is conducted before drilling a borehole to gain insight into the water’s quality and quantity. It is well documented that underground water is a superior source of drinking water than surface water. This is due to the following reasons:
1) Less chance of contamination, particularly if the area is at least 20 meters away from any sanitary works.
2) The water is purified as it flows through stones and sand.
3) Boreholes remain closed, thus lowering the possibility of contamination.
4) Groundwater has a stable temperature in spite of seasonal changes.
5) Greater probability of water availability in the summer as the sources are situated at a deeper level.