¹Associate Professor, Hydrogeological Lab,Departmennt of Geology, Periyar University, Salem-11 India

²Research Scholar, Department of Geology, Periyar University, Salem-11 India

³Assistant Professor, Department of Civil Engineering, Jayalakshmi College of Engineering Technology,Thoppur, Dharmapuri

Email:-provnkdswrn@gmail.com

Remote sensing (RS) and Geographical Information System (GIS) has proved to be an efficient tool in delineation of drainage pattern and water resources management and its planning. GIS and image processing techniques have been adopted for the identification of morphological features and analyzing their properties of the Vaniyar watershed parts of Dharmapuri and Salem districts in the state of Tamil Nadu, India. The morphometric parameters such as linear, aerial and relief aspects of the river basin were determined and computed. The watershed falls on the hard rock crystalline rocks. The groundwater occurring under water table condition and mainly stayed in the weathered mantle and secondary porosity. The Vaniyar is an ephemeral stream flowing in the central part of the watershed. The lithogical controls on the permeability of the hard rock aquifer. The watershed further classified as a 15 micro watershed based on drainage network. The comparisons among the 15 micro watersheds became more effective and are viewed in the light of their respective morphometric parameters. It is 7^th order drainage basin and drainage pattern mainly in subdendritic to dendritic type. The morphometric parameters worked out include Drainage density, Drainage texture, Bifurcation ratio, Stream order, Stream length, Stream length ratio, Stream frequency, Basin length, Form factor, Elongation ratio and Circulatory ratio. The morphometric analysis reveals that the comparisons of all the fifteen micro watersheds out of four micro watersheds have the lowest drainage density and high permeability. The present investigation for a smaller watershed is suggested as a more fruitful particularly in heterogeneous hard rock terrain.