Hypsometric Analysis of Varattaru River Basin of Harur Taluk, Dharmapuri Districts, Tamilnadu, India using Geomatics Technology

Hypsometric analysis describes the distribution of horizontal crosssectional area of river morphology with respect to elevation (areaaltitude analysis). Morphology of a river basin plays primary role in the dynamics of surface and subsurface water runoff generation. It is also an essential tool to measure and represent the form of a watershed and its evolution. Aim of the paper is to carry out the Hypsometric analysis of Varattaru river basin of Harur taluk, Dharmapuri district, Tamilnadu using remote sensing and GIS technologies. Hypsometric data were derived and analyzed for each of the divided sub zone of Varattaru river basin from the 30 meter ASTER DEM. It was found that highmedium hypsometric integrals/elevationrelief ratios indicating a youthful to mature stage landscape, medium to complex denudational processes, the linear river morphological changes of this river basin and remote sensing data and open source tools it becomes less tedious to make hypsometric integrals and curves. This paper emphasizes the rainwater harvest practices and management for the watershed at suitable locations for controlling further erosion, reducing the runoff and increases the groundwater potential.