Identification of Critical Sub-Watershed of Kotani Watershed in Chhattisgarh based on Morphometric Analysis using Geospatial Techniques

Author: Dileshwari, M.P. Tripathi, Janhavi and Usha Yadav

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Abstract

In this work, the suitable soil and water conservation measures and its development in the Kotani watershed have been achieved using the morphometric analysis-based recognition of critical sub-watershed, remote sensing and GIS techniques. In the delineation and identification of drainage lines, as well as in the management and planning that are water-based assets geospatial method has been found to be an effective tool. The work has shown that geospatial techniques can potentially use to evaluate morphometric aspects of the Seonath basin. The linear, areal and relief aspects, were used in the morphometric study. Various identification ranks were assigned after the compound factor has been assessed. In the ArcGIS 10.3 environment, DEM from the SRTM and additional thematic layers including drainage pattern and drainage density were created and analyzed. The results of identification of sub-watershed shows that critical sub-watershed SW1 falls under high priority rank because its compound parameters value was found to be lowest as 5.6. The Kotani watershed SW1 has low form factor, low elongation ratio, steep slopes, high drainage density, and high stream frequency.

Keywords

GIS, morphometric parameter, drainage basin

Conclusion

The current study highlights the utility of remote sensing and GIS approaches in identifying key sub-watersheds based on morphometric analysis. Results of identification of critical sub-watersheds shows that SW1 falls under very high priority category and greater risk to soil erosion SW1 has been identified by steep slope, high drainage density, high stream frequency, low form factor, and low elongation ratio. The greater the degree of soil erosion in the SW1, the more likely it is that soil conservation measures will be implemented. Immediate attention to soil conservation measures is essential in the SW1 to protect the land from future erosion and to mitigate natural dangers. One significant disadvantage of morphometric analysis is that it provides little information on the spatial distribution of shape changes across the organism. Morphometric analysis techniques must be adopted by all government and non-government organizations involved in the planning, implementation, and managing of watershed programs in the Chhattisgarh.

References

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How to cite this article

Dileshwari, M.P. Tripathi, Janhavi and Usha Yadav (2023). Identification of Critical Sub-Watershed of Kotani Watershed in Chhattisgarh based on Morphometric Analysis using Geospatial Techniques. Biological Forum – An International Journal, 15(6): 508-515.