International Journal on Science and Technology

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Integrated Morphometric Analysis for Erosion Susceptibility Assessment and Sub-Watershed Prioritisation in the Kamandala Naganadhi watershed of Palar Basin, Tamil Nadu, India

Author(s) Aravind Raj S, Udayan A, Bhaskaran G
Country India
Abstract Morphometric analysis provides a quantitative framework for understanding drainage basin characteristics and their influence on hydrological response and erosion processes. The present study evaluates the Kamandala Naganadhi watershed using an integrated approach encompassing linear, areal, drainage texture, and relief morphometric parameters derived from Digital Elevation Model (DEM) data within a GIS environment. The results reveal significant spatial heterogeneity in basin geometry, drainage organisation, and terrain characteristics, which strongly influence runoff generation and sediment transport dynamics. Sub-watersheds exhibiting high drainage density, stream frequency, relief ratio, and ruggedness number demonstrate enhanced erosion susceptibility due to increased runoff velocity and reduced infiltration capacity. A compound factor (CF)-based prioritisation approach was employed to classify sub-watersheds into five categories ranging from very high to very low priority. Sub-watersheds 4C2A7c and 4C2A7d were identified as highly vulnerable zones requiring immediate intervention. The study highlights the effectiveness of morphometric analysis as a cost-efficient and scalable tool for watershed prioritisation and sustainable land and water resource management, particularly in data-scarce regions.
Keywords Morphometric analysis; Drainage density; Erosion susceptibility; Watershed prioritization; GIS; Kamandala Naganadhi
Field Biology > Geology
Published In Volume 17, Issue 2, April-June 2026
Published On 2026-04-12
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