The study of morphometric analysis of Amaravathi River drainage basin has been conducted based on the secondary source, the SRTM data has been downloaded from GLCF website. The downloaded data has been analyzed using ArcGIS software, the study Linear, Relief and Arial aspects of drainage basin retrieved that, total numbers of streams are 16369, in that 12695 are first orders, 2871 are second orders, 626 are third orders, 142 are fourth order, 27 are fifth orders, 7 are sixth orders, 1 is seventh order streams. The tributaries branch irregular in all directions and join the main stream at all angles. The dendritic and sub-dendritic drainage which reflects the homogeneous character of the subsurface materials in the Amaravathi River Basin, Tamil Nadu. The length of stream segments is maximum for first order stream and decreases as the stream order increases. The linear aspects considered for the study include stream order, stream number, stream length, bifurcation ratio and length ratio. The areal aspects include basin area, form factor, circulatory ratio, elongation ratio, drainage density, stream frequency, length of overland flow and the relief aspects considered for the present study are basin relief and ruggedness number. The study of the drainage map reveals that the amaravathi River Basin is consequent in nature, whose course is due to the slope of the land surface. Tributaries joining the main stream, whose direction of flow is controlled by structural features, are called subsequent streams. Most of the lower order streams are found to be in sequent in nature joining the higher order main stream. The tributaries branch irregular in all directions and join the main stream at all angles. The dendritic and sub-dendritic drainage which reflects the homogeneous character of the subsurface materials in the Amaravathi River Basin, Tamil Nadu
