A simple introduction to this answer can revolve around a general statement about ground water resources.

Ground water has emerged as the backbone of India’s agriculture and drinking water security.

The contribution of ground water is nearly 62 per cent in irrigation, 85 per cent in rural water supply and 50 per cent in the urban water supply.

Ground water is an annually replenishable resource but its availability is non-uniform in space and time.

The availability of groundwater resources in a given area is determined by several factors such as rainfall intensity and duration, geological strata of the area, the number of existing recharge structures, and extraction by consumers for a variety of purposes such as industrial applications, drinking/domestic purposes, irrigation, and so on.

Body

You may incorporate some of the following points in the body of your answer:

Consequences of the depletion of the ground water

• According to the journal “Drift of Earth’s Pole Confirms Groundwater Depletion as a Significant Contributor to Global Sea Level Rise 1993–2010”, published in the journal Geophysical Research Letters, the excessive extraction of groundwater for drinking and irrigation has shifted the Earth’s axis of rotation.
• According to the Central Groundwater Board of India, around 17 per cent of groundwater blocks are overexploited (meaning the rate at which water is withdrawn exceeds the rate at which the aquifer can recharge), while 5 per cent and 14 per cent are at critical and semi-critical phases, respectively.
• The government’s support for the “green revolution” to ensure food security has increased the demand for groundwater for agriculture.
• The depletion of ground water resources will demand the extraction of water from deeper inside the Earth.
• The depletion of water resources will reduces the water bodies, lakes and will restrict the biodiversity
• The depletion of water resources will lead to salt contamination of the ground water.