Morphological analysis of Sher River basin using GIS for identification of erosion-prone areas

摘要

The morphological analysis has been used to identify the erosion-prone sites in the Sher river basin which is one of the sub-basins of the greater Narmada basin, Madhya Pradesh, India. The Sher river basin has been divided into the forty five sub-basins of fourth order and fourteen sub-basin areas representing fifth, sixth and seventh order streams. The various morphological parameters have been derived for Sher river basin and its derived sub-basins to describe their topographical conditions, drainage patterns and their probable response to the runoff. The erosional risk prone map for the study area has been prepared using Texture-Slope Index and the erosional scale of the basin has been prepared using the same index. The derived erosional scale has been arranged into '0' to '100' numerical scale in which the base values '0' and '100' denote the least and the highest erosion prone areas respectively. Comparative study of the sub-basins has been carried out by use of developed erosional scale. Classified erosional hazard map has been categorized into low, medium, high and very high sediment erosion. The classified map of erosional hazard may be useful to suggest various soil water conservation measures for water resources development and management.