What is the main source of groundwater recharge?

What is the term used for underground layers of rock that store and transmit groundwater?

Which of the following States faces the most serious issue of groundwater over-exploitation?

Which type of rock formation is most commonly associated with low groundwater storage?

At some places ground water is stored between layers of hard rock below the water table. This is known by which name?

Which one of the following factors does not affect the distribution of groundwater?