Brahamaputra Basin

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Brahamaputra Basin Figure 6. Dam classification based on storage Figure 7. Dam classification based on purpose www.india-wris.nrsc.gov.in 42
Brahamaputra Basin 3.2.4 Command area and canals network Canals are man-made channels for conveyance of water. When the water is to be transported across landscape to deliver the water to the respective command areas by canal network, construction of various irrigation structures are necessary to negotiate terrain including drains, road, rail lines. Important Irrigation structures are Regulators, Bridge, Aqueduct / Syphon Aqueduct, Super passage / Syphon, Level crossing / Inlets and Outlets, and Other Cross drainage Structures. Distributary head regulator controls the supply to an off taking channel from the parent channel. In Brahmaputra Basin there are few completed and ongoing major irrigation projects. But, the canal network is not very much extensive in this basin (Map 12). Unlike other states of India, irrigation was hardly practiced for agricultural production in the north-eastern region. In the mid sixties, a few irrigation projects were developed in Assam. There is no shortage of water for irrigation.But due to limitations of topography and frequency of flood in lower reaches of the basin large scale irrigation is not feasible in Arunachal Pradesh and Arrasm. However due to hilly terrain, the drainage of water is very fast thus causing water stress during dry spell. Surface water resources are tapped in this region either by diversion structures or by pumping for irrigation. As per the India WRIS database, there are 25 major & medium command areas in this basin, out of which 7 are major and 18 are medium commands. Teesta Barrage (Phase-I, St.I, Sub Stage I Irrigation Project), Dhansiri Irrigation Project, Champamati Irrigation Project, Integrated Kallong Irrigation Project, Bordikarai Irrigation Project, Jamuna Irrigation Project, are those major projects having considerable command area falling within the Brahmaputra Basin. Majority of the commands are falling in the lower Brahmaputra Sub basin. Only 3 ongoing medium command areas namely Dzuzza command of Nagaland, Buridehing and Rangma of Assam are falling in the upper Brahmaputra sub basin. Teesta Barrage (Phase-I, St.I, Sub Stage I) is an ongoing major Irrigation Project of West Bengal havinga large command area falling in both the Brahmaputra and Ganga Basin. Teesta Mahananda Link Canal off take from the Mahananda Barrage, Teesta Jaldhaka Main Canal off take from Teesta Barrage and their minor and distributaries irrigate the Jalpaiguri and Kochbihar areas of Brahmaputra Basin. The Dhansiri Irrigation project has irrigating the Udalguri and Darrang districts of Assam. Dhansiri R.B.C originating from Dhansiri Barrage and it’s minor and distributaries have irrigated a command area of 78.86 Th.ha. The Champamati Irrigation project has command area of 39.42 Th.ha falling in Kokrajhar and the Chirang districts of Assam. Right Bank and the Left Bank canal off take from the Barrage across river Champamati have irrigating the Kokrajhar and Sirang districts respectively. Bordikarai Irrigation Project has command area of 28.666 Th.ha irrigating the Sunitpur district of Assam. Jamuna Irrigation Project is the completed major project of Assam irrigating Sonitpur district with a command area 28.13 Th.ha. The Ultimate Iirrigation Potential (UIP) and Culturable Command Area (CCA) of all the major and medium irrigation projects of Brahmaputra basin are listed in Annexure IV: C. A study was carried out jointly by CWC & ISRO to assess the existing status of the irrigation commands. IRS P4 LISS III data of two different seasons namely, pre monsoon (2005) and post monsoon (2004) were used for delineation of waterlogged and salt affected areas of major and medium irrigation commands of Brahmaputra basin. Total waterlogged area in this basin was 2243.13 ha. www.india-wris.nrsc.gov.in 43
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Brahamaputra Basin Version 2.0 www.
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Brahamaputra Basin Acknowledgements
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Brahamaputra Basin Besides, this re
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Brahamaputra Basin Annexure VI : Sa
Page 9 and 10: Brahamaputra Basin Most interesting
Page 11 and 12: Brahamaputra Basin Table 1. Salient
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Page 36: Brahamaputra Basin www.india-wris.n
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Page 43 and 44: Brahamaputra Basin 2. Hydrological
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Brahamaputra Basin 9 Kaliabor Lift
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Brahamaputra Basin 4 Umtru Umtru HE
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Brahamaputra Basin Sediments (Quate
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Brahamaputra Basin 56 Krishna Nagar
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Brahamaputra Basin 1 Shillong Guwah
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Brahamaputra Basin 4 Dharamtul Assa
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Brahamaputra Basin West Bengal and
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Brahamaputra Basin Annexure VII : I
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Brahamaputra Basin ppm PS PW Q R&R
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Brahamaputra Basin Authors ISRO Off
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Brahamaputra Basin Lead Centre: Reg
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Brahamaputra Basin

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