|
|
Report
on the Hard Rock Ground Water Estimation
CHAPTER
1
INTRODUCTION
1.1 BACKGROUND
The estimation
of ground water resources of the country is being periodically carried
out for the purpose of planning of ground water development. First time
in 1979, the ground water resources were estimated using a methodology
recommended by, 'Committee on Over-exploitation of Ground Water Resources'.
In 1984, the methodology was modified by a committee known as 'Ground
Water Resources Estimation Committee (GEC)'. Upon completion of the assessment
of ground water resources of the country using the GEC-1984, it was observed
that this methodology needed further modification in the light of enhanced
database and experimental studies in the field of hydrogeology. The methodology
of GEC-1984 was then revised to the methodology of GEC-1997.
The principle
adopted in GEC-1997 methodology, though reasonably valid in an approximately
homogenous hydrologic terrain like alluvium may not be applicable for
hard rock terrain where the hydrogeological conditions vary widely within
small area under prevailing heterogeneous set up. Significantly almost
two third of the country is occupied by hard rock terrain.
To get a more
appropriate methodology for ground water resources estimation for hard
rock terrain, which will supplement the GEC-1997, Ministry of Water Resources,
Govt. of India, constituted a committee on 03.09.2001.
1.2 COMPOSITION
OF THE COMMITTEE
The Committee
headed by Chairman, CGWB and drawing members from CGWB, State Ground Water
Departments and Academic Institutes, consisted of the following:
1. Chairman
, Central Ground Water Board, Chairman
2. Member
(Survey, Assessment and Monitoring) , Member, Central Ground Water Board,
3. Dr. Saleem
Romani, Member, Regional Director/ Member (SM&L),Central Ground Water
Board,
4. Sh. S.K.
Sharma, Member, Regional Director,Central Ground Water Board,
5. Sh. S.M.
Mendhekar, Member, General Manager, National Bank for Agriculture &
Rural Development, Mumbai
6. Prof. B.B.
S. Singhal, Member, Formerly Prof., University of Roorkee,Roorkee
7. Dr. Srikant
D. Limaye, Member, Director, Ground Water Institute,Pune
8. Prof. K. Sridharan, Member, Deptt. of Civil Engineering, Indian Institute of Science,Bangalore
9. Director
, Member, Ground Water Department, Govt. of Andhra Pradesh, Hyderabad
10. Director,
Member, Ground Water Surveys & Development Agency, Govt. of Maharashtra,
Pune
11. Sh. G.C.
Sahu, Member Ex. Engineer In Chief, Water Resources, 1034, Mahanadi Vihar,
Post Naya Bazar, Cuttack, Orissa
12. Sh. V.M.
Sikka, Member, Regional Director, Central Ground Water Board,
13. Sh. M.B.
Raju,* Member, Regional Director, Central Ground Water Board, (* Till
Superannuation)
14. Sh. Rana
Chatterjee Member Secretary, Scientist 'C' Central Ground Water Board
1.3 TERMS
OF REFERENCE
The terms
of reference of the Committee are as follows -
(i) To review the scientific studies done in the field of ground water
resource assessment in hard rock terrains.
(ii) To re-look into the validity of the recommendations of GEC-1997 regarding
the hard rock resource assessment and if found necessary suggest alternate
methodology for assessment of ground water resource in hard rock terrain.
(iii) To recommend norm for various parameters applicable for calculation
of groundwater resource in hard rock terrain.
(iv) Any other aspect relevant to the terms referred above.
1.4 PROCEEDINGS
OF THE COMMITTEE
The Committee held seven meetings, that were also attended by special
invitees from various State Government Departments, National Institute
of Hydrology and Regional Offices of CGWB. During the course of meetings,
several presentations were made on - the case studies undertaken to review
the GEC-1997, modifications over the existing methodology and alternate
methodologies for ground water resources estimation. Draft reports were
prepared by two sub-committees viz., Sub-Committee I comprising - Sh.
P.C. Chaturvedi, Member (SAM), CGWB, Dr. Saleem Romani, Member (SML),
CGWB and Sh. V.M. Sikka, Regional Director, CGWB and Sub-committee II
comprising Dr. B.B.S. Singhal, formerly Professor of University of Roorkee.
Sh. Rana Chatterjee, Member Secretary assisted the sub-committees. The
draft report and several important issues raised during the deliberations
of the meetings of the Committee, were referred to all the user State
Government departments, Regional Offices of CGWB and academic institutes
for their considered opinions.
The draft
report and the observations received on it from various quarters were
discussed at length in the meetings of the Committee before finalization
of the report. The committee has also reviewed the scientific studies
done in the field of ground water resources assessment in hard rock terrains
and the summarized contents are annexed. The final recommendations of
the committee comprise of two parts: (i) the issues/ modifications on
which there was unanimity, and (ii) the issues that could not be resolved.
Chapter 2
| Chapter 3
|
|
Ministry
of Water Resources