Overview of Rainfall Induced Landslide Events and Importance of Geotechnical Investigations in Nilgiris District of Tamil Nadu, India

  • V. Senthilkumar
  • S. S. ChandrasekaranEmail author
  • V. B. Maji
Conference paper


Landslide is a major natural hazard, which possesses serious threat to human population and various other infrastructures such as road, rail routes and other structures in the hilly terrain. Nilgiris district, located in southern state of Tamil Nadu in India, is basically a hilly region, lying at an elevation of 1000–2600 m above Mean Sea Level (MSL). The district regularly receives rainfall during both the southwest and the northeast monsoons. The average rainfall in this region is between 1500 and 3000 mm. Due to the steep slopes and heavy rainfall during monsoons, the district is highly prone to landslides. In recent times, occurrence of landslides in Nilgiris is increased due to sudden burst of development activities in the region. The present study gives an overview of landslide events and remedial options practiced so far in Nilgiris and emphasises the importance of geotechnical investigation in that region. The history of landslide events has been collected and soil samples have been taken from the places where, major landslides have occurred in the past to characterise them. The rainfall data have been collected to understand the influence of rainfall on landslide occurrence. From this study, it is observed that the main triggering factor for landslide in Nilgiris is heavy intense rainfall. Though the rainfall is main triggering factor, many causal factors are also involved in triggering of landslides. It is also observed that, the remedial measures practiced in this area was not site specific and mainly concentrated on construction of retaining walls and small gabion walls. To understand the failure mechanism of landslides, various effects of pore water pressure and to suggest suitable site specific remedial measure to prevent the recurrence of such failures in the future, detailed geotechnical investigations are required.


Nilgiris Landslides Hazard Rainfall Pore pressure 



The authors thank Department of Science and Technology (DST-NRDMS Division), Government of India, New Delhi, for sponsoring the study reported in this paper through the project ‘‘Geotechnical Investigation on Landslide in Nilgiris district of Tamilnadu’’ (Project sanction order NRDMS/11/2003/012 dt: 25/09/2014).


  1. Bhandari RK (2006) The Indian landslide scenario, strategic issues and action points. India Disaster Management Congress, New Delhi 29–30 November 2006, Session A2, Keynote address, 1–18Google Scholar
  2. Chandrasekaran SS (2010) Assessment of damages induced by recent landslides in Ooty, Tamil Nadu. In: Proceedings of the Indian geotechnical conference (IGC-2010) GEOtrendz, IIT Bombay, Mumbai, India, Dec 16–18, pp 687–688Google Scholar
  3. Chandrasekaran SS, Sayed Owaise R, Ashwin S, Jain Rayansh M, Prasanth S, Venugopalan RB (2013) Investigations on infrastructural damages by rainfall-induced landslides during November 2009 in Nilgiris, India. Nat Hazards 65(3):1535–1557CrossRefGoogle Scholar
  4. Ganapathy GP, Mahendran K, Sekar SK (2010) Need and urgency of landslide risk planning for Nilgiris District, Tamil Nadu state, India. Int J Geomat Geosci 1(1):29–40Google Scholar
  5. GSI (2011) Landslide incidences for the year 2009.,805816&_dad=portal&_schema=PORTAL (01-8-2016)
  6. Hunger O, leroueil S, Picarelli L (2014) The Varnes classification of landslide types, an update, Landslides 11(2):167–194Google Scholar
  7. Jaiswal P, van Westen C, Jetten V (2011) Quantitative assessment of landslide hazard along transportation lines using historical records. Landslides 8(3):279–281CrossRefGoogle Scholar
  8. NDMG (National Disaster Management Guidelines (2009) Management of landslides and snow avalanches. A publication of the National Disaster Management Authority, Government of India, New DelhiGoogle Scholar
  9. Surya P, Anil K (2014) A selected annotated bibliography and bibliography on landslides in India, National Institute of Disaster Management, Ministry of Home Affairs, Government of India, New Delhi 110 002, 172 pGoogle Scholar
  10. Nilgiris (2011) Natural disaster management—The Nilgiris. (01-08-2016)
  11. Seshagiri DN, Badrinarayanan S, Upendran R, Lakshmikantham CB, Srinivasan V (1982) The Nilgiri landslides—Results of geotechnical and geological investigations, Miscellaneous Publication No. 57, Geological Survey of India, 1–41Google Scholar
  12. Varnes DJ (1978) Slope movements and types and processes, landslides analysis and control. In: Transportation Research Board Special Report, vol 176. National Research Council, Washington, D.C., pp 11–33Google Scholar

Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • V. Senthilkumar
    • 1
  • S. S. Chandrasekaran
    • 1
    Email author
  • V. B. Maji
    • 2
  1. 1.Geotechnical Engineering SCALEVIT UniversityVelloreIndia
  2. 2.Department of Civil EngineeringIIT MadrasChennaiIndia

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