Punjab’s desertification

Subject – Environment

Context – Two reports, 2 decades apart, predicted Punjab’s desertification in 25 years

Concept –

The Punjab Vidhan Sabha committee, constituted to study water table depletion, has recently said that the state will turn into a desert in the next 25 years if the present trend of drawing water from underground aquifers continues.
This is a prediction that has been made before – over two decades ago, a study on water table depletion in Punjab had projected almost the same time frame of 25 years, saying aquifers in Punjab could be depleted by 2025.
- According to Central Ground Water Board (CGWB) officials, the study was titled ‘The State of the World Report, 1998′, published by Washington-based World Watch Institute (WWI). It said Punjab’s aquifers could be depleted by 2025.

Why will the land of five rivers (now 2.5 rivers after the Partition of Punjab) turn into a desert?

Out of 138 blocks in Punjab, 109 have already gone into the ‘dark’ or over-exploited zone, which means groundwater extraction is more than 100 per cent here.
Two fall under ‘dark/critical’ zone (groundwater extraction is 90 to 100 per cent), while five are under semi-critical (groundwater extraction 70 to 90 per cent) zone.
This means that around 80 per cent blocks of the state have already dried up and four per cent are on the verge of it.

Reasons for this scarcity:

More water is being drawn than it is being replenished. The rate of water extraction in Punjab is 1.66 times against the rate of replenishment.
Because of the adoption of a faulty cropping pattern. Paddy crop hampers water recharging because of the puddling method used to prepare fields for transplanting.