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Introduction to Landslide

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What are landslides?

A landslide is the mass movement of rock, soil, and debris down a slope due to gravity. It occurs when the driving force is greater than the resisting force.It is a natural process that occurs in steep slopes. The movement may range from very slow to rapid. It can affect areas both near and far from the source.

Landslide materials may include:

  • Soil
  • Debris
  • Rock
  • Garbage
Landslide triggers
Landslide triggering conditions
Modes of failure

landslide2

landslide

Rockslide-debris Avalanche,Brgy. Guinsaugon, St. Bernard, Southern Leyte, February 2006

rain induced

Rain-induced landslide, Panaon Island, Southern Leyte, December 2003

rain induced flow

Rain-induced debris flow, Brgy. Mayana, Barili, Cebu, December 2014 – TS Seniang

earthquake induced

Earthquake-induced rockslide, Brgy. Conalum, Argao, Cebu,
October 2013 – M 7.2 Bohol Earthquake

cut slope

Landslide on a cut slope, Brgy. Manipis, Talisay City, Cebu, September 2015

solid waste

Solid-waste slide, Brgy. Payatas, Quezon City, Metro Manila, July 2000

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