Write a note on ground water development and its potential in india
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Write a note on ground water development and its potential in india.

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By:electron

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The total annual replenishable ground water resources of the country have been assessed as 433 billion cubic meter (BCM). Existing gross ground water draft as on March 2004 for all uses is 231 BCM per year. The stage of ground water development is about 58%. The development of ground water in different areas of the country has not been uniform. Highly intensive development of ground water in certain areas in the country has resulted in over exploitation leading to decline in the levels of ground water and sea water intrusion in coastal areas. There is a continuous increase in dark and over-exploited areas in the country.

As per the latest assessment of ground water resources carried out jointly by the Central Ground Water Board (CGWB) and the States, the assessment units are categorized as 'over exploited'/'critical' and 'semi-critical' based on the stage of ground water development and the long-term water level declining trend during the past decade (1995-2004). Out of 5,723 assessment units (Blocks/Mandals/Talukas) in the country, 839 units in various States have been categorized as 'over exploited', i.e., the annual ground water extraction exceeds the annual replenishable resource. In addition, 226 units are 'critical', i.e., the stage of ground water development is above 90 per cent and less than 100 per cent of annual replenishable resource with significant decline in long term water level trend in both pre-monsoon and post-monsoon period. There are 550 semi-critical units, where the stage of ground water development is more than 70 per cent. List of these areas has been circulated to the State Pollution Control Boards and the Ministry of Environment and Forests which refer the new industries/projects falling in these areas to the Central Ground Water Authority (CGWA) for obtaining clearance for ground water withdrawal.


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