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Geotechnical problems in planning and execution of an hydro-electric project in Darjeeling Himalaya
Summary The Darjeeling Himalayas, with its perenial rivers flowing through narrow gorges amidst high ranges, provides considerable scope for Hydro-Power development. Six major rivers, the Jaldhaka, Rammam, Rangit, Mahananda, Balason and Teesta, which straddle through this mountainous region, offer a cumulative power potential, of the order of 1200 M.W. at 50 % load factor. Various river valley schemes have been envisaged to utilise their power potential and some of these schemes have already been executed. The region is geologically complex, terrain-wise difficult and seismically active. The constituent geological formations range from late Tertiary to Precambrian gneisses. The Palaeozoic and Precambrian constitute several thrust sheets piled one over the other, the older rocks exhibiting increasing grades of metamorphism. Structurally the rocks are highly fractured, faulted and folded. Past glacial and frost action as well as stream erosion on the fractured rock mass has given rise to a thick pile of overburden along the valley slopes. The present paper deals with the nature of major geotechnical problems in the region and their impact/significance in the planning and execution of hydro-electric projects in the area.
Geotechnical problems in planning and execution of an hydro-electric project in Darjeeling Himalaya
Summary The Darjeeling Himalayas, with its perenial rivers flowing through narrow gorges amidst high ranges, provides considerable scope for Hydro-Power development. Six major rivers, the Jaldhaka, Rammam, Rangit, Mahananda, Balason and Teesta, which straddle through this mountainous region, offer a cumulative power potential, of the order of 1200 M.W. at 50 % load factor. Various river valley schemes have been envisaged to utilise their power potential and some of these schemes have already been executed. The region is geologically complex, terrain-wise difficult and seismically active. The constituent geological formations range from late Tertiary to Precambrian gneisses. The Palaeozoic and Precambrian constitute several thrust sheets piled one over the other, the older rocks exhibiting increasing grades of metamorphism. Structurally the rocks are highly fractured, faulted and folded. Past glacial and frost action as well as stream erosion on the fractured rock mass has given rise to a thick pile of overburden along the valley slopes. The present paper deals with the nature of major geotechnical problems in the region and their impact/significance in the planning and execution of hydro-electric projects in the area.
Geotechnical problems in planning and execution of an hydro-electric project in Darjeeling Himalaya
Chatterjee, B. (author)
1979
Article (Journal)
English
Geotechnical problems in planning and execution of an hydro-electric project in Darjeeling Himalaya
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