1 Department of Geography, Institute of Science, Banaras Hindu University, Varanasi-05, India 2 Department of Geography, University of Suceava, Romania
Pages:
1 - 13
Abstract:
Landslide is a major hydrogeological hazard that affects large
parts of Himalayan area of Uttarakhand state in India. The developments in
Geo-spatial technologies have opened the doors for detailed and accurate
assessment of landslide prone area. This paper deals with a use of temporal
remote sensing data and geographical information systems for landslide
mapping. Six categories of controlling factors for landslides i.e. slope
gradient, aspect, lithology, land use land cover (LULC), drainage density,
lineament density are defined in this study. Normalized Difference
Vegetation Index (NDVI) has been generated to identify the vegetated and
non-vegetated area. During the study, it is clearly revealed that a total
number of about 695 landslides spots covering an area of 2.30 sq. km. were
mapped from Landsat-OLI-TRS image of 2015 whereas a total number of 157
landslides covering an area of 1.60 sq. km. were mapped from Landsat-ETM+
image of the year 2005. This study is valuable for hazard zonation, mitigation
purpose and regional planning in the Himalayan area.