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Intensive Survey for
Groundwater Potential Assessment on Water Shed Basis
| While assessing
groundwater potential block wise, the whole block is classified as
over-exploited, critical, semi-critical or safe, but there are some
pockets with in over-exploited and critical blocks where the groundwater
potential is more, or in some semi-critical or safe, there are places
where the development is more than estimated. |
To
eliminate the above conditions, it was decided to take intensive survey
for groundwater potential assessment on Water Shed basis. Totally 1552
mini watersheds have been taken up for the study and it is under progress. |
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Groundwater Potential
Assessment
Based on the Methodology and
norms, issued by the Groundwater Resources Estimation Committee 1997, set up by
the Government of India, the groundwater assessment was made for all blocks in
Tami Nadu. The status of groundwater development and the category of blocks as
follow:
ASSESSMENT FOR
THE YEAR 2003
| Sl.No. |
Groundwater
Development |
Categorisation |
No. of
Panchayat Union / Blocks |
|
1. |
Groundwater
Development is lesser than 70% of the annual recharge |
Safe |
97 |
| 2. |
Groundwater
Development is greater than 70% but less than 90% |
Semi
critical |
105 |
| 3. |
Groundwater
Development is greater than 90% but less than100% |
Critical |
37 |
| 4. |
Groundwater
Development is greater than 100% of the annual recharge |
Over-Exploited |
138 |
| 5. |
Saline
Blocks |
Saline |
8 |
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Total |
|
385 |
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