Geomorphological Analysis and Prioritization of Subwatershed of Raichur City Karnataka Using Weighted Sum Approach

Mohammed Badiuddin Parvez¹ , M Inayathulla²

Section:Research Paper, Product Type: Journal-Paper
Vol.5 , Issue.9 , pp.33-46, Sep-2019

Online published on Sep 30, 2019

Copyright © Mohammed Badiuddin Parvez, M Inayathulla . This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
 

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Abstract :
Prioritization of watershed has picked up significance in watershed management. Morphometic analysis is been commonly applied to prioritize the watershed. In the present study two mini watersheds in Raichur city have been considered Mini-watershed 1 with an area of 519.32 km2 with highest order stream of 6 Mini -Watershed 2 with an area of 360.97 km2 with highest order stream of 5. There are Seven Subwatersheds in both the Mini-watersheds. Various morphometric parameters namely Bifurcation ratio(Rb), Drainage density(Dd), Stream frequency(Ns), Texture ratio(T), Form factor(Rf), Circularity ratio(Rc), Elongation Ratio(Re), length of overland flow, shape factor(Bs), compactness ratio (Cc) has been determined for each subwatershed and allotted position on premise of relationship as to arrive at a Compound value for final ranking of subwatershed. The morphometric parameters ranges between Rb (2.95-5.50), Dd (1.218-1.373), Ns (0.890-1.182), T (0.731-1.590), Rf (0.230-0.850), Rc (0.246-0.500), Re (0.55-1.04), Cc (1.40-1.83), Lof (0.364-0.411), and Bs (1.17-4.20). It is found that in Mini-watershed 1 50.87% of area falls under Very high Priority category 32.94% under high, 8.96% under medium and 7.23% under very low priority category and in Mini-watershed 2 20.34% of area falls under very high, 19.82% under high and 59.84% under medium priority category.

Key-Words / Index Term :
GIS, DEM, Morphometric analysis, Subwatershed, Priority, Compound Factor

References :
[1]. Horton R.E.(1945). Erosional Development of streams and their drainage basins, Hydro physical approach to quantitative morphology. Geological Society of American Bulletin. 56: 275-370.
[2]. Mohammed Badiuddin Parvez, M Inayathulla “Prioritization Of Subwatersheds of Cauvery Region Based on Morphometric Analysis Using GIS”, International Journal for Research in Engineering Application & Management (IJREAM), Volume: 05 Issue: 01, April -2019.
[3]. Mohammed Badiuddin Parvez, M Inayathulla “Modelling of Short Duration Isopluvial Map For Raichur District Karnataka”, International Journal for Science and Advance Research in Technology (IJSART), Volume: 05 Issue: 4, April -2019.
[4]. Mohammed Badiuddin Parvez, and M .Inayathulla. "Morphometry, Hypsometry Analysis and Runoff Estimation of Aam Talab Watershed Raichur, Karnataka" International Journal Of Advance Research And Innovative Ideas In Education Volume 5 Issue 3 2019 Page 1713-1727
[5]. Mohammed Badiuddin Parvez, M Inayathulla, “Development of S Curve for Mini-Watershed of Raichur City Karnataka”, International Journal of Scientific Research in Multidisciplinary Studies , Vol.5, Issue.8, pp.1-11, 2019.
[6]. Vijith, H and Sateesh, R. (2006). GIS based morphometric analysis of two major upland Sub-watershed of Meenachil river in Kerala. Journal of Indian society of Remote Sensing. 34(2): 181-185.