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Morphometry of the Payaswini Watershed, Coorg District, Karnataka, India, Using Remote Sensing and GIS Techniques

D.N. Vinutha, M.R. Janardhana

The study of various morphometric characteristics of the Payaswini watershed is important to evaluate landslide incidences occurring in a part of Coorg district of Karnataka state. In view of this, linear, areal and relief aspects of the Payaswini river basin , in addition to shape factors, were evaluated. Prior to watershed based morphometry, the study area was divided into seven sub-basins using Survey of India toposheets on 1:50000 scale, Ortho-rectified Landsat MSS and ETM imageries. Digital Elevation Model (DEM) prepared by using ASTER data and Geographical Information System (GIS) tool. More than 12 morphometric parameters were computed at watershed level. The study helps to identify landslide susceptible areas.