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Ground Water Resources
Quantification of ground water resources is one of
the major input in planning ground water development
and management, at the same time, it is one of the basic
input for funding ground water development projects
by financial institutions such as NABARD. The resource
assessment and the categorisation of assessment units
as per the stage of development forms a basis for implementing
regulatory measures by Central Ground Water Authority.
In order to standardize methodology for computation
of ground water resources various special studies have
been carried out in different hydrogeological conditions
throughout the country. In this regard, Central Ground
Water Board undertook water balance studies between
1974 and 1985 through 3
domestic and 9 bilateral projects with assistance
from UNDP, SIDA, UK and Canada. These projects covered
both soft and hard rock formations in various places
throughout the country. Findings of these projects helped
in better understanding of the ground water system and
led to formulation of methodology for estimation of
annually replenishable ground water resources of the
country. The methodology of estimation has been standardized
by an expert group drawing Members from Central Ground
Water Board, NABARD, State Ground Water Departments,
and Academic Institutions and is being modified at regular
intervals. The previous methodology known as GEC'84
has been modified and a revised methodology(GEC97) which is being followed for re-estimation
of country's replenishable ground water resources.
Ground Water Resources of the country
have been assessed and being updated periodically. There
are two types of resources viz.
-
Annually Rechargeable Dynamic
Ground Water Resource: This resource is computed
jointly by CGWB and State Ground Water Departments
-
Static Ground Water Resource:
This occurs below the dynamic resource and it has
been evaluated on the basis of explorartory drilling
of CGWB. Till now the static resource has been assessed
to the depth of 400m in soft rock and 200m in hard
rock
Dynamic
Groundwater Resource
| Total Annual Replenishable
Ground Water Resource - 433.02 bcm |
| Annual Ground water Draft - 230.62 bcm |
| Ground water Availability for future irrigartion - 162.29 bcm |
| Projected demand for domestic and industrial uses up to 2025 - 29.17 bcm |
Ground Water Resources
How it is assessed.
Dynamic
Ground Water Resources (States & UTs)
(Download Report on Dynamic Ground Water Resources of India)
Category of Blocks
State
wise Category of Blocks
Hard Rock Committee Report
| Chapter -1 | |Chapter-2 | |Chapter -3 |
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Ministry
of Water Resources