Question

Give an account on water resources of Tamil Nadu.

Answer 1

1. Tamil Nadu constitutes 4% of India’s land area and is inhabited by 6% of India’s population, but has only 2.5% of India’s water resources.
2. More than 95% of the surface water and 80% of the groundwater have already been put into use.
3. Major uses of water include human/animal consumption irrigation and industrial use.
4. The state is heavily dependent on monsoon rains.
5. The annual average rainfall is around 930 mm (47% during the northeast monsoon, 35% during the southwest monsoon, 14% in summer, and 4% in winter.

6. Surface Water Resources	Numbers
   River Basin	17
   Reservoirs	81
   Tanks	41,127
   Tube wells and other wells	4,98,644
   Open wells	15,06,919
   Total (Million Cubic meters)	2046788 MCM