Below the surface of the earth, there is a zone where are
opening air all rocks are completely filled with water. A spring occurs when
water finds a natural opening in the ground that is below this water table.
Like an opening in the side of the valley, actually the spring water is flowing
downwards. Those springs, which receive water from deep within the water zone,
flow all the year round and are called permanent spring. Some spring have their
opening near the water table. They actually flow only during the rainy season
when the water level is at its highest. These springs are called intermittent
spring. As spring water actually underground water, it carrying some mineral on
it. When the spring water contains an unusual amount of mineral matter, it is
called a mineral spring. Also , some spring water comes in the contended with
hot , underground rocks, and it get hot. They are called thermal or hot spring.
