Hydrological Studies of Atlur Mandal in YSR District, andhra Pradesh using SRTM data and GIS Techniques

IJEP 42(9): 1146-1152 : Vol. 42 Issue. 9 (September 2022)

B. Muralidhara Reddy1, V. Sunitha2* and S.C. Subramanyam1

1. Yogi Vemana University, Department of Earth Sciences, Kadapa – 516 005, Andhra Pradesh, India
2. Yogi Vemana University, Department of Geology, Kadapa – 516 005, Andhra Pradesh, India


This study attempts to study the hydrological characteristics of Atlur area sub-watershed using geoprocessing techniques in GIS. This technique is found relevant for the extraction of study area and its drainage networks. The extracted drainage network was classified according to Strahler’s system of classification and it reveals that the terrain exhibits dendritic to sub-dendritic drainage patterns. The study area was of fifth order to lower order streams with a drainage density value of 1.48 km/km2. The slope of basin varied from 0-450 and the slope variation is chiefly controlled by the local geology and erosion cycles. The elongation ratio of the basin is 0.63 indicating that the study area is elongated with moderate relief and steep slopes. The drainage texture of the basin is 3.1 indicating an intermediate texture that exists over the region. Remote sensing data (SRTM-DEM) coupled with geoprocessing techniques prove to be a competent tool used in morphometric analysis and evaluation of linear, slope, areal and relief aspects of morphometric parameters. Moreover, the data can be used for basin management and other hydrological studies in future.


Hydrological studies, Morphometric parameters, Atlur mandal, SRTM data, ArcGIS


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