Applied and Natural Science Foundation
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Journal of Applied and Natural Science
An International Journal | Print ISSN: 0974-9411 | Online ISSN: 2231-5209
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Journal of Applied and Natural Science 4(2):167-171(2012)
Drainage basin morphometric analysis and its relationship with altitude of Uttarkashi District
N. P. Naithani and Mala Bhatt
Department of Geology, H.N.B. Garhwal University Campus, Badshahi Thaul, Tehri-Garhwal -249 199 (Uttarakhand), INDIA *Corresponding author. E-mail: Received: December 8, 2011; Revised received: April 18, 2012; Accepted: July 27, 2012
Abstract : The area of investigation lies between Maneri and Gangnani along the Bhagirathi river in the lesser and central Himalayan block of Garhwal Himalayas. The rocks of Garhwal group are represented by quartzites, sericite quartzite’s and talc chlorite schist intruded by metabasics, whereas the Central crystallines are constituted by gneisses, schists, migmatites and amphibolites. For the purpose of drainage basin morphometric analysis 100 third order drainage basins were marked. Drainage basin morphometric parameters of 100 basins were calculated. On the basis of lithology and tectonic setup, the area was divided into three morphogenetic units viz Central crystallines, Thrust zone and Garhwal group. The basins which were situated below 2500 mts are categorized under low altitudes and above 2500 as basins of higher altitudes. The relationship between deainage basin morphometric parameters and altitude suggest that basins situated at higher altitude have higher value of stream frequency, number of first and second order streams, fine texture and low drainage density.

Keywords : Altitudes, Central crystallines, Drainage basin, Garhwal group, Morphometric parameter
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