naa a22 4500 510756131 CHVBK 20180411083123.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1007/s12594-013-0203-7 doi (NATIONALLICENCE)springer-10.1007/s12594-013-0203-7 Landslide hazard zonation in and around Thodupuzha-Idukki-Munnar road, Idukki district, Kerala: A geospatial approach [Elektronische Daten] [P. Biju Abraham, E. Shaji] Landslide hazard zonation in and around Thodupuzha — Idukki — Munnar road (TM Road) in Idukki district, Kerala, India has been carried out using geospatial techniques. Being a landslide prone area a hazard zonation is attempted using terrain fragility concept. Based on the traverse mapping, slide prone areas and palaeo-slides along the TM road were identified. Precambrian crystallines consisting of hornblende-biotite gneiss, biotite gneiss, granite gneiss, charnockite and pink granites form the main rock types. Factor maps of various terrain parameters such as slope, landuse, relative relief, drainage pattern, drainage density, landform, and surface material were prepared and their integration carried out on a GIS platform. Based on geospatial analyses, the study area (438 sq. km) is ranked into four classes of relative fragility viz. highly fragile (8.25 sq. km), fragile (41.25 sq. km), moderately fragile (232 sq. km) and stable (156.5 sq. km). The first two categories together form 11% of the area, the most hazardous regions, which require immediate mitigation measures for slope protection. The study forms a basis for evolving a strategy for the development of the entire TM road of Idukki district. The fragility concept used in this study is a fast and cost effective model for identifying landslide prone areas, especially in the Western Ghats. Geological Society of India, 2013 Slope stability nationallicence Fragility nationallicence Landslides nationallicence Geospatial analyses nationallicence Western Ghats nationallicence Kerala nationallicence Biju Abraham P. Department of Geology, University of Kerala, Kariavattom Campus, 695 581, Thiruvananthapuram, India aut Shaji E. Department of Geology, University of Kerala, Kariavattom Campus, 695 581, Thiruvananthapuram, India aut Journal of the Geological Society of India Springer India 82/6(2013-12-01), 649-656 0016-7622 82:6<649 2013 82 12594 https://doi.org/10.1007/s12594-013-0203-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12594-013-0203-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Biju Abraham P. Department of Geology, University of Kerala, Kariavattom Campus, 695 581, Thiruvananthapuram, India aut NATIONALLICENCE 700 1- Shaji E. Department of Geology, University of Kerala, Kariavattom Campus, 695 581, Thiruvananthapuram, India aut NATIONALLICENCE 773 0- Journal of the Geological Society of India Springer India 82/6(2013-12-01), 649-656 0016-7622 82:6<649 2013 82 12594 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer