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

INTERNATIONAL JOURNAL OF GEOMATICS AND GEOSCIENCESInternational Journal of Geomatics and GeosciencesInternational Journal of Geomatics and Geosciences, Volume 2, No 1, 2011

Sandipan Ghosh

“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 wet­ dry type  of climate  plays a crucial role in  hillslope erosion and channel erosion.

Erosion intensity map

Erosion intensity map

“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.”