Author : Gopal Sharma and S. Sanjeevi

The aim of this study is to carry out a detailed GPR survey in conjunction with remote sensing techniques to prepare Landslide Hazard Zonation map of Katteri watershed in the Nilgiris-Tamil Nadu, India. The methodology involves satellite image interpretation and ground-penetrating radar (GPR) surveys, GPR surveys was used to determine the thickness of the weathered overburden that is likely to slide if triggered. Different thematic layer (Geomorphology, Lineament density, Drainage density, Land cover/Land use, lithomarge thickness and NDVI) were prepared from DEM and ETM images and from GPR data. Based on the susceptibility index the landslide susceptibility zones are classified into five classes. The susceptibility level increases with the increase in susceptibility index. It is seen that north eastern and north-western region of the watershed is high to moderately susceptible to landslide, the central portion is moderately susceptible whereas the south western portion is less susceptible.

Keywords: Landslide, GPR, lithomarge thickness, Remote Sensing, ranks and weights, GIS analysis, susceptibility

Article published in International Journal of Current Engineering and Technology, Vol.5, No.2 (April-2015)