What causes Landslides? (BY: Damie Ing Jia Ying)

Types of Landslides

Types of Landslides

In general, the factors which influence whether a landslide will occur typically include slope angle, climate, weathering, water content, vegetation, overloading, geology, and slope stability.
How these factors interrelate is important in understanding what causes landslides along with an understanding of the impact humans have on these factors by altering natural processes.
Typically, a number of elements will contribute to a landslide, but often there is one which triggers the movement of material.

Natural causes include:

  • Elevation of pore water pressure by saturation of slope material from either intense or prolonged rainfall and seepage
  • Vibrations caused by earthquakes
  • Undercutting of cliffs and banks by waves or river erosion
  • Volcanic eruptions.

Human causes include:

  • Removal of vegetation
  • Interference with, or changes to, natural drainage
  • Leaking pipes such as water and sewer reticulation
  • Modification of slopes by construction of roads, railways, buildings, etc
  • Overloading slopes
  • Mining and quarrying activities
  • Vibrations from heavy traffic, blasting, etc
  • Excavation or displacement of rocks.

It is important for engineers and geologists to evaluate slope stability and any landslide threat during development assessments so that effective and timely remedial measures can be implemented.

 

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s