Evaluation of the morphometric parameters requires preparation of drainage map, contour map, ordering of the various streams and measurements of catchment area, perimeter, relative relief, relief ratio, length of drainage channels, drainage density, drainage frequency, bifurcation ratio, texture ratio, circulatory ratio and constant channel maintenance, which help to understand the nature of the drainage basin. The present study involves the Geographic Information System (GIS) analysis techniques to evaluate and compare linear, relief and aerial morphometry of the sub-watershed. The study area chosen was Gurupura catchment which lies in Dakshina Kannada District. The study area geographically lies between 12°56° N longitude and 74°550 E latitude. The originate of Gurupura River is in the Western Ghats and is a tributary of the Nethravathi River, which empties into the Arabian Sea, south of Mangalore Karnataka India. The catchment covers an area 141 Sq. km and is covered in Survey of India (SOI) Topo sheet numbers 57D/7, 57D/6, 57D/4, 57D/3, 57D/2, 57D/8 and D43V/15.
