Morphometricanalysis of sub-basins in and aroundmalur taluk, Kolar District, Karnataka using remote sensing and GIS techniques

Ramaiah, S. N. and Gopalakrishna, G. S. and Srinivasa Vittala, S. and Najeeb, K. M. (2012) Morphometricanalysis of sub-basins in and aroundmalur taluk, Kolar District, Karnataka using remote sensing and GIS techniques. Nature Environment and Pollution Technology, 11 (1). pp. 89-94. ISSN 0972-6268

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Abstract

The study reveals that remote sensing and GIS techniques proved to be the competent tool in analysing various morphometric parameters.The drainage network of Kanamanahalli and Devaraguttahalli sub-basins were delineated using false colour composite (FCC) of IRS-1C/1D merged satellite data on 1:50,000 scale. SOI toposheets were used as reference with limited field work. The study area falls in Ponnaiyar river basin covering an area of 686 sq. km comprising two sub-basins namely Kanamanahalli and Devaraguttahalli having an area of 439 sq.km and 247 sq.km respectively in and around Malur taluk of Kolar district. The morphometric analysis of these two sub-basins shows that the terrain exhibits dendritic to sub-dendritic drainage pattern. Stream order ranges from first to sixth order. Drainage density varies between 1.57 and 1.88 km/km2 and has coarse to fine drainage texture. The relief ratio ranges from 0.0111 to 0.0117. The mean bifurcation ratio varies from 3.51 to 4.86 which fall under normal basin category. The elongation ratio shows that these sub-basins are associated with high relief and steep ground slopes.

Item Type: Article
Uncontrolled Keywords: Remote sensing, Bifurcation ratio; Coarse to fine; Drainage density; Drainage networks; Drainage patterns; Elongation ratio; False colour; Field works; Karnataka; Morphometric analysis; Remote sensing and GIS; River basins; Satellite data; Stream order; Study areas; Subbasins, Catchments, bifurcation; drainage network; fieldwork; GIS; morphometry; remote sensing; river basin, India; Karnataka; Kolar; Ponnaiyar Basin
Subjects: F Earth Science > Geology
Divisions: Department of > Earth Science
Depositing User: MUL SWAPNA user
Date Deposited: 07 Jan 2021 07:43
Last Modified: 12 Jan 2021 11:28
URI: http://eprints.uni-mysore.ac.in/id/eprint/15330

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