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sardar-sarovar

Need for Sardar Sarovar Yojana

Post 2nd World War 20th Century is marked by end of colonial era. Countries - small and big, after attaining political freedom, embarked on ambitious programme of economic development. The twin problem of under employment and poverty has been the most difficult challenge they have been facing. They are no doubt endowed with diverse natural resources, which have remained unharnessed. Burgeoning population has thrown up army of unemployed young people who are asset if gainfully used, but an explosive liability if kept idle. The crucial task for the planners and leaders of these countries is to channelise the unharnessed natural resources - land, water, minerals, forests, sea wealth and so on and the idle manpower so as to transform them into productive wealth for the people.

Arable land and fresh water are two important resources of India. India's arable land area is 30% more than that of China which is as such three times India in size - geographically. India's surface water estimated at 1952 BCM is about two-third that of China. India's northern region makes up the World's largest alluvial plane and the soils rank among the most fertile in the World. And yet India remains poor and underfed : Then, what is the handicap? It is two-fold - first our arable land is spread out stretching from Kachchh to Brahmaputra valley and from Deccan trap to planes of Punjab, while bulk of surface water sources are concentrated in about a dozen river basins; second, 80 to 90% of surface water is available only in monsoon months, and flows down the sea if not impounded. Therefore neither water nor land is utilised optimally, depriving the country of their full benefits. The Sardar Sarovar Project, or any other large water resources project for that matter, has to be viewed in this national perspective.

In course of 50 years of planned economic development of our country, we have taken tremendous strides in agriculture sector. Our country which had to depend upon imports to feed even a population of 350 millions (35 crores) when we became independent, has attained a position of self sufficiency with some exportable surplus even with a population of over 1 billion (102 crores). This has been made possible by harnessing waters of major rivers of our country with a chain of large multipurpose projects starting from Bhakhara Nangal, Hirakud, Nagarjuna Sagar, Tungabhadra etc. India's population continues to grow notwithstanding our all out efforts on family planning front. Various studies indicate that country's population might cross 120 crores by 2020 A.D. Thus we shall have additional 200 million (20 crores) people to be accommodated in our production basket of food grains, sugar, cotton, edible oil and so on. This can be possible only by creating more Bhakhara Nangals and more Hirakuds. Harnessing entire water resources of the country is the only way to sustain our self-sufficiency in basic requirement of food and clothing. Other countries of the World have also done the same. And the faster we go on this path better assured we shall be on the food security and keeping poverty and hunger at bay, improving the quality of life and providing electricity to light the rural homes and energise wheels of Cottage Industries.

Main Features of Sardar Sarovar Yojana

Dam
1 Length of main concrete gravity dam 1210.00 m
2 Maximum height above deepest foundation level 163.00 m
3 Top R.L. of dam. 146.50 m
4 Catchments area of river above dam site 88,000 Sq. km
5 Live storage capacity 0.58M.Ha.m (4.7 MAF)
6 Length of reservoir
Maximum width
Average Width
214.00 km
16.10 km
1.77 km
7 Spillway gates
Chute Spillway
Service Spillway

7 Nos. 60' x 60'
23 Nos. 60' x 55'
8 Spillway Capacity 84949.25 cumecs
(30 lakh cusecs)
Power Houses
1 River bed power house 1200 MW
2 Canal head power house 250 MW
Canal System
Main Canal
1 Full supply level (F.S.L.) at H.R. 91.44 m (300 ft)
2 Length upto Gujarat - Rajasthan border 458.00 km
3 Base width in head reach 73.01 m
4 Full supply depth (F.S.D.) in head reach 7.60 m
5 Design discharge capacity  
  (1) In head reach 1133 cumecs
(40,000 cusecs)
  (2) At Gujarat Rajasthan border 71 cumecs
(2,500 cusecs)
Distribution System
1 Numbers of Branches 38
2 Length of distribution system network 66000.00 km
3 Culturable Command Area 18.45 lakh hectares

Narmada Main Canal

Narmada Main Canal is a contour canal. It is the biggest lined irrigation canal in the world. It is about 458 km. long up to Gujarat -Rajasthan border. It has a capacity to flow 1133 cumecs (40000 cusecs) at its head-at Kevadia and reducing to 71 cumecs (2500 cusecs) at the Gujarat - Rajasthan border. The canal extends further in the state of Rajasthan to irrigate areas in Barmer and Jhalore districts of Rajasthan. The cross section of the canal, at its head is 73.1m x 7.6m (Bed width x Full supply depth), with 2:1 inner side slope. It has a velocity of water in the initial reach is 1.69 m/sec.

The Main Canal is lined with plain cement concrete to minimise seepage losses to attain higher velocity and to control the water logging in future. The lining work is carried out with the mechanized paver. Such a large scale paving of concrete lining is done for the first time in India.The Main Canal in its journey has to negotiate several water streams, rivers, roads, railways etc. This is possible by constructing appropriate structure on the canal. In all, there are 598 Structures on the Narmada Main canal. Out of this 236 structures are cross drainage structures, comprising of 5 aqueducts, 15 canal syphons, 182 drainage syphons, 33 canal crossing and one super passage.

There are 89 Regulating structures comprising of 1 Main HR, 44 Branch HR, 32 Cross Regulators and 12 Escapes. There are total 274 nos. of Road Bridge including national Highway, State Highway, MDR5, ODRB, VRB, and UVRB etc. (A statement showing the structures in different reach is kept at Annex-I) Narmada Main Canal as on today is almost completed up to 458 km. and water has flown through it and has reached the state of Rajasthan. Statement showing total number of structures on Narmada Main Canalare as under

Reach in Km. Total No. of structures Aqueducts Canal Syphon Drainage Syphon Canal crossing + Super Passage Head Regulator Cross Regulator Escape Bridges
0 to 144.5 193 5 1 66 18 16 13 3 71
144.5 to 263.265 154 - 7 34 8+1 12 10 6 76
263.265 to 356.422 134 - 5 46 5 10 8 2 63
356.422 to 388.164 37 --- 1 11 --- 2 2 1 20
388.164 to 458.318 80 --- 1 25 1 5 4 -- 44
Grand Total 598 5 15 182 33 45 32 12 274

Branch Canals

Sr. No. Name of Canal Chainage of NMC (km) Sr. No. Name of Canal Chainage of NMC (km) Sr. No. Name of Canal Chainage of NMC (km)
1 Wadia 9.931 14 Nahra 111.645 27 Kharaghoda 292.398
2 Tilakwada 17.871 15 Desar 126.645 28 Zinzuwada 301.041
3 Mandwa 25.263 16 Sanali 171.961 29 Bolera 326.389
4 Bhilodia 32.694 17 Mehmdabad 187.074 30 Rajpura 344.772
5 Timbi 38.523 18 Ghodasar 202.368 31 Amarapura 354.000
6 Sankheda 45.109 19 Vehlal 212.546 32 Radhanpur 374.486
7 Miyagam 62.916 20 Daskroi 223.667 33 Kachchh 385.814
8 Gojali 70.236 21 Dholka 246.286 34 Vejpur 405.722
9 Vadodara 81.834 22 Sanand 258.632 35 Madka 417.792
10 Dena 88.770 23 Saurashtra 263.200 36 Malsan 423.732
11 Dumad 100.026 24 Viramgam-I 267.063 37 Dhima 438.552
12 Sakarda 102.953 25 Viramgam-II 277.166 38 Godasisar 453.837
13 Zumkha 106.905 26 Goriya 290.605      

 

Benefits

Irrigation
The Sardar Sarovar Project will provide irrigation facilities to 18.45 lac ha. of land, covering 3112 villages of 73 talukas in 15 districts of Gujarat. It will also irrigate 75,000 ha. of land in the strategic desert districts of Barmer and Jallore in Rajasthan and 37,500 ha. in the tribal hilly tract of Maharashtra through lift. About 75% of the command area in Gujarat is drought prone while entire command (75,000 ha.) in Rajasthan is drought prone. Assured water supply will soon make this area drought proof.
Drinking Water Water Supply
A special allocation of 0.86 MAF of water has been made to provide drinking water to 135 urban centres and 8215 villages (45% of total 18144 villages of Gujarat) within and out-side command in Gujarat for present population of 18 million and prospective population of over 40 million by the year 2021. All the villages and urban centres of arid region of Saurashtra and Kachchh and all "no source" villages and the villages affected by salinity and fluoride in North Gujarat will be benefited. Water supply requirement of several industries will also be met from the project giving a boost to all-round production
Power
There will be two power houses viz. River bed power house and canal head power house with an installed capacity of 1200 MW and 250 MW respectively. The power would be shared by three states - Madhya Pradesh - 57%, Maharashtra - 27% and Gujarat 16%. This will provide a useful paking power to western grid of the country which has very limited hydel power production at present.
A series of micro hydel power stations are also planned on the branch canals where convenient falls are available.
Flood Protection
It will also provide flood protection to riverine reaches measuring 30,000 ha. covering 210 villages and Bharuch city and a population of 4.0 lac in Gujarat.
Wild Life
It is also proposed to develop wild life sanctuaries viz. "Shoolpaneshewar wild life sanctuary" on left Bank, Wild Ass Sanctuary in little Rann of Kachchh, Black Buck National Park at Velavadar, Great Indian Bustard Sanctuary in Kachchh, Nal Sarovar Bird Sanctuary and Alia Bet at the mouth of River.
Additional Production
SSP would generate 5,000 million units of electricity. On completion, annual additional agricultural production would be Rs. 1600 crores, power generation Rs. 400 crores and water supply Rs. 175 crores, aggregating about Rs. 2175 crores every year equivalent to about Rs. 6.0 crores a day.
Other Benefits
Benefits to small and marginal Scheduled Caste/ Scheduled Tribe farmers would be as under :
Marginal farmers (< 1 ha.) 28.0 %
Small farmers (1 to 2 ha.) 24.4%
Scheduled tribe 8.7%
Scheduled Caste 9.1%
Against One Tribal Displacesd, 7 Tribles Would Get Benefits.
In addition, there will be benefits of fisheries development, recreational facilities, water supply for industries, agro industrial development, protection of conserved forest from grazers and secondary benefits viz employment generation, increase in vegetal cover in 3.4 M. Ham. of GCA, gains due to compensatory forest, tree plantation 100 times and Carbon Dioxide (CO2) fixation to large extent by 70 times.