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International Journal of Geomatics and Geosciences
Year : 2011, Volume : 2, Issue : 1
First page : ( 71) Last page : ( 90)
Online ISSN : 0976-4380.

Quantitative and Spatial Analysis of Fluvial Erosion in relation to Morphometric Attributes of Sarujharna Basin, East Singhbhum, Jharkhand

Ghosh Sandipan, M. Phil. Scholar, Post-Graduate

Dept. of Geography, The University of Burdwan, Burdwan, West Bengal, India. sandipanghosh19@gmail.com

Online published on 4 January, 2012.

Abstract

Being the southeastern part of famous Chotanagpur Plateau of India, the Sarujharna Basin is deemed to be considered as a small museum of Indian geology and geomorphology. On the tectonically stable and frequently modified Dhanjori Highlands (southwest of Singhbhum Shear Zone, copper belt) rivers like Sankh, Netra, Sarujharna, Jou, Gara etc. crave out several geomorphic architects (youthold phase) which signify the variable intensity of fluvial erosion. Having different magnitude of rock résistance and spatial variability of forest cover, the monsoonal wetdry type of climate plays a crucial role in hillslope erosion and channel erosion. The present article emphasizes on the spatial distribution and quantification of fluvial erosion taking drainage basins and slope facets as an ideal geomorphic unit. Side by side, to realize the pattern of erosion we have focused on surface runoff, length of overland flow, constant of channel maintenance, hillslope erosion model, length and number of 1st order stream which are the indirect morphometric measurements of normal erosion. Along with it Geographical Information System (GIS) is used to depict the physical appearance of erosion in thematic maps.

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Keywords

Morphogenetic region, surface runoff, length of overland flow, constant of channel maintenance, hillslope erosion model, erosion intensity and GIS.

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