Open AccessAssessing landslide vulnerability in Kohima city, Nagaland: A geospatial approach
Author(s) -
Yhoshu Kedovikho,
Y.V. Krishnaiah
Publication year - 2020
Publication title -
national geographical journal of india
Language(s) - English
Resource type - Journals
ISSN - 0027-9374
DOI - 10.48008/ngji.1747
Subject(s) - landslide , thematic map , lineament , geospatial analysis , vulnerability (computing) , drainage density , hazard , remote sensing , land cover , cartography , geology , geographic information system , land use , lithology , geography , hydrology (agriculture) , geomorphology , drainage basin , civil engineering , geotechnical engineering , tectonics , seismology , computer science , chemistry , computer security , organic chemistry , engineering , paleontology
Kohima located in the Eastern Himalaya of Northeast India experience numerous landslides and soil creeps annually. Landslides, the resultant of various interactions i.e., geological, geomorphologic, meteorological factors etc., caused immense loss economically and environmentally. Kohima city experiences the torrential amount of rainfall which further aggravate landslide hazard. This paper implores the use of high-resolution satellite data for deciphering landslide vulnerability mapping through remote sensing and GIS technique. Factors such as land use and land cover, lithology, lineament, drainage, road, aspect and slope were used as thematic input layers for landslide vulnerability mapping. The bivariate statistical method particularly Information Value method was used to extract the information from the landslide and the various controlling factors to generate the landslide vulnerability map. Validation of the landslide vulnerability mapping using classification and R-index methods along with ground observation were used to create the final vulnerability map.