Advanced International Journal of Multidisciplinary Research

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Quantitative morphometric characterisation of sub-watersheds in the Amaravati basin using remote sensing and GIS

Author(s) Ms. Pavithra V G Gowda, Dr. Shivanand Chinnappanavar, Dr. Ravi Kumar M
Country India
Abstract Drainage-basin morphometry encodes the hydrological, erosional and structural behaviour of a catchment and provides an objective basis for watershed management and groundwater assessment. This study applies an integrated remote-sensing and geographic-information-system (GIS) framework to characterise the morphometry of the Amaravati basin, a tributary catchment of the Cauvery in peninsular India. A digital elevation model was used to delineate the drainage network and to partition the basin into 27 sub-watersheds (SWC1–SWC27). For each sub-watershed, linear (stream order, stream length, stream-length ratio, bifurcation ratio), relief (basin relief, relief ratio, ruggedness number) and areal (drainage density, stream frequency, texture ratio, form factor, circularity ratio, elongation ratio, length of overland flow, constant of channel maintenance) parameters were computed following the standard methods of Horton, Strahler, Schumm and Miller. The network exhibits a predominantly dendritic pattern, indicating relatively homogeneous lithology with limited structural control. Low drainage density and low-to-moderate relief across most sub-watersheds suggest permeable substrate, appreciable infiltration and good groundwater prospects, while elongation- and form-factor values indicate mostly elongated basin shapes associated with attenuated, longer-duration flood peaks. The sub-watershed-scale parameter set provides the quantitative foundation for subsequent prioritisation for soil and water conservation.
Keywords morphometric analysis; sub-watershed; drainage network; GIS; remote sensing; groundwater; Amaravati basin
Discipline Physical Science
Published In Volume 3, Issue 4, July-August 2025
Published On 2025-08-08
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