This project seeks to divert water from west flowing rivers to semi arid Karnataka

1. Welcome
Presentation on diversion of west flowing streams from
the upper reaches of Western ghats near Sakleshpura,
Hassan district
E I Technologies Pvt. Ltd.

2. The Project
2
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Scheme for diversion of flood water from selected streams
near Sakleshpura (West) to provide drinking water to
drought prone areas, which includes selected taluks of
Tumkur, Chitradurga, Bangalore rural and north
besides Kolar & Chikkaballapura districts (East)

3. Introduction
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Karnataka State having a geographical area of 1,91,976 sq.km happens to be
the eighth largest State in India with a population of 52.85 millions as per
2001 census. It is blessed with major perennial rivers such as Godavari,
Krishna, and Cauvery besides 13 West flowing rivers.

The intensity of rainfall across the State varies from 400 mm in the Eastern
and Central area to more than 6000 mm in Western Ghats. Scanty and
erratic rainfall in the Eastern and Central Karnataka has resulted in the area
becoming gradually drought prone.

4. Introduction
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It is pertinent to note that as per statistics available, Karnataka is second only
to Rajasthan when drought prone areas are considered.

Out of several districts, which are facing acute drinking water shortage
besides underground water becoming polluted, Bangalore Rural, Tumkur,
Kolar and Chikkaballapur happens to be the worst affected and the
ground water in some of these places has fluoride content much in
excess of permissible limit.

5. River basin map of Karnataka
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No.
E I Technologies Pvt. Ltd.
River Systems
Drainage Area
1000 sq. km
1.
Godavari
2.
%
4.43
2.31
Krishna
113.01
58.93
3.
Cauvery
36.13
18.84
4.
North Pennar
6.94
3.62
5.
South Pennar
3.76
1.96
6.
Palar
2.97
1.55
7.
West Flowing
Rivers
24.53
12.79
191.77
100
Total

6. Drought map of Karnataka
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2/3rd of Geographical area of Karnataka
State is under arid/semi arid conditions
and stand 2nd only to Rajasthan in the
country in terms of its drought prone
areas
(SOURCE dmc.kar.nic.in)

7. Yield of Rivers in Karnataka
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Drainage Area
No.
1.
2.
3.
4.
5.
6.
7.
River Systems
1000
sq. km
Godavari
4.43
Krishna
113.01
Cauvery
36.13
North Pennar
6.94
South Pennar
3.76
Palar
2.97
West Flowing Rivers
24.53
Total 191.77
Estimated Average annual yield
%
MCM
TMC
2.31
58.93
18.84
3.62
1.96
1.55
12.79
100.00
1415
27451
10980
906
56600
97352
50
970
388
32
2000
3440

8. Plight of People & Quality of Water
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E I Technologies Pvt. Ltd.
Incidentally, all the four Districts fall under the Cauvery, Palar and Pennar
basins, but there is acute scarcity in availability of Drinking water, resulting in
exploitation of underground water to a great extent. The water table has
reached alarming depths of 305 m to 427 m (1000 to 1400 ft).

Quality of water being used especially in the Districts of Chikkaballapura and
Kolar are contaminated. Since there are no options, the people are using the
same water and getting affected by several water borne diseases, due to the
presence of harmful salts like Fluorides, Nitrates etc.

9. Efforts by GoK & Initiatives
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E I Technologies Pvt. Ltd.
Government of Karnataka has earlier initiated several proposals to mitigate
the drinking water problem and to improve the quality. However, the projects
implemented have not met the required results since sustainability and
assured quantity of water is not guaranteed.

This has resulted in identifying an independent source which is free from
Interstate Dispute and at the same time can act as a sustainable source.
Such source is the West Flowing Streams.

10. Present Proposal
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E I Technologies Pvt. Ltd.
Diversion of surplus flood waters from upper reaches of Yettinahole,
Kadumanehole, Kerihole and Hongadahalla streams by lifting and conveying
it to east to benefit Kolar, Chikkaballapura, Bangalore (Rural) and Tumkur
Districts. Following table reveals the beneficiary statistics in the above
districts.
Sl.No
1
2
3
4
Total
Population as
per Census,
Name of the Benefiting District
2011
Area in sq.km Population Growth
Bangalore (Rural)
9,87,257
2,239
16.02%
Tumkur
26,81,449
10,598
3.74%
Kolar
11.04%
15,40,231
4,012
Chickballapura
12,54,377
4,208
9.17%

11. Present Proposal
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E I Technologies Pvt. Ltd.
On detailed study and evaluation, some of the streams which are originating
at the highest level close to Sakhleshpura in the Western Ghats i.e.
Yettinahole, its tributaries and other streams have been identified as most
suitable source. The streams that have been proposed to be harnessed are
listed below.
1.
2.
3.
4.
5.
Yettinahole
Yettinahole Tributary-1
Yettinahole Tributary-2
Kadumane hole – 1
Kadumane hole - 2
6. Yettinahole lower reach
7. Kerihole
8. Hongadahalla hole

12. Streams identified for harnessing
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No. Name of the Elevation
stream
(m)
1 Yettinahole
2 Yettinahole
Tributary - 1
3 Yettinahole
Tributary– 2
4 Kadumane
hole-1
5 Kadumane
hole – 2
Catchment
area
(Sq Km)
Yield (June to
November) TMC
Divertible yield and
dependability (June to
November) TMC
50% 90% 75% 50%
7.99 10.15 10.89 11.91
1.18
800
810
48.80
7.20
90% 75%
6.08 6.75
0.90 1.00
850
9.80
1.22
1.36
1.60
900
13.80
1.72
1.91
2.26
950
7.50
0.93
1.04
1.23
87.08
10.85 12.06
Total=
14.26
10.15
10.89
11.91

13. Streams identified for harnessing
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No. Name of the Elevation Catchment
stream
(m)
area
(Sq Km)
6
7
8
Kerehole
Yettinahole
down stream
Hongada
halla
Yield (June to
November) TMC
75%
3.35
1.61
Divertible yield and
dependability (June to
November) TMC
50% 90% 75% 50%
3.97 3.90
4.16
4.42
1.90
7.44
8.81
760
770
24.30
11.60
90%
3.02
1.45
730
60.20
6.70
96.06
183.14
11.17 12.40 14.68 10.27
22.02 24.46 28.94 20.42
Total
Total
6.37
6.88
7.68
11.04
21.93
12.10
24.01
The total divertible yield at 50% and 75% dependability will be 24.01
TMC and 21.93 TMC respectively.

14. Harnessing West Flowing streams
14
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It is difficult to harness the entire water available in Western Ghats
due to
 Environmental constraints
 Presence of Western Ghats barrier which is quite high.
 Engineering challenges
 Economic viability
Hence , an effort has been made to divert only a meager
percentage of water that too from the upper reaches of the
Western Ghats close to the plateau.

15. West Flowing River – Proposed Scheme
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E I Technologies Pvt. Ltd.
Extent of Watershed Area in Western Ghats of Karnataka – 26,390 Km2
Available Catchments – 13
Present Scheme considers tapping streams which are originating from upper
reaches of Western Ghats near Sakleshpur having an elevation above 800 m
It is clear from the above schematic representation that a meager percentage of water is being
planned to be diverted from West to East for the purpose of meeting the drinking water
requirement in the drought prone areas in the present scheme.

16. Scheme at a glance
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The present scheme envisages the following:-

It is proposed to have simple diversion structures across the stream which will
have a capacity to hold the water for a maximum of about one hour and
keeping the water level restricted within the flanks of the streams.

A suitable intake structure and lifting arrangements will be planned on the
foreshores in order to lift the water only during peak monsoon / floods and for
the rest of the time the water will be allowed to flow.

The water from the pump house will be conveyed and lifted through dedicated
raising main (pipes) which will be buried under the ground.

17. Scheme at a glance
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The pipeline will be routed parallel to existing corridors in order to minimize the
opening of the new corridors for laying of these pipelines.

The Raising mains will be taken from the intake structure up to Haravanahalli
near Sakleshpura beyond which it is planned to have a gravity canal (233 km)
to convey the water up to Tumkur. The alignment of the canal has been
planned along the ridge line bifurcating the Cauvery and Krishna basins.

A raising main for a length of 8.1 km has been planned to convey the water to
a storage Reservoir, near Devarayana Durga, with a capacity of about 10
TMC.

18. Scheme at a glance
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E I Technologies Pvt. Ltd.
From the reservoir two raising mains have been proposed one to
Chikkaballapura (88.2 km) and other to Kolar (55.9 km) to feed MI Tanks in
the respective Districts.
Cost

Based on the line estimate that has been prepared considering the general
alignment that has been envisaged (as explained above) the preliminary
costing works out to about Rs.8323.50 crores for diverting about 24 TMC of
water. In other words, the cost of diverting the 1 TMC of water will be about
Rs. 346.81 crores.

19. Index map – Diversion scheme within western Ghats
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19

20. Index map of the Scheme
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SHIMOGA
A.P
CHITRADURGA
CHIKBALLPUR
UDUPI
TUMKUR
CHIKMAGLUR
HASSAN
KOLAR
MANGALORE
MANDYA
T.N

21. Salient features
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No
Particulars
Scheme
1
Total combined yield in TMC
24.01
2
Catchment area in Sq.Km
176.74
3
Length of Garland canal /pipeline within
Western Ghats in Km
4
Extent of area to be acquired in Ha
81.6 Km (Pipeline)
192
(30 m width)
i) In Forest (Ha)
20
ii) Others (Ha)
172
5
Accessibility
Good
6
Ease of Construction
Easy
7
Time for completion
3 years
8
Cost of the Project in crores
8323.50
9
Cost per TMC in crores
346.81

22. Conclusion
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E I Technologies Pvt. Ltd.
The scheme envisaged happens to be the best option available for the
Government of Karnataka to mitigate the drinking water problems being faced by
the people in the eastern plateau especially Kolar and Chikkballapur districts.

In order to implement this scheme , detailed investigations followed by a
comprehensive DPR is necessary and the same is already initiated by Govt. of
Karnataka .

The present scheme envisaged by KNNL, that of diverting surplus water from
Yettinahole and other streams near Sakleshpura can be taken up immediately as
the investigations and preparation of DPR could be completed early.

23. Conclusion
23
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The said scheme of diverting 24.01 TMC of surplus water from Yettinahole
and other streams is sustainable , free from tribunals, least effect on ecology
and environment of Western Ghats, and cause least effect to the downstream
commitments.

The scheme of diverting surplus water from Yettinahole can be taken up and
completed within Five year span thereby mitigating the drinking water
problems of Kolar and Chikkaballapura districts within a short time.

24. E I Technologies Pvt. Ltd.
Discussions

25. 25
Thank You