DRR_M3Landslide Flashcards
ground movement on a sloping terrain
landslide
gravity induces the ground to move downward
landslide
aggravated by erosion
landslide
what are the four types of landslides
- soil creep landslide
- slumping landslide
- debris flow landslide
- rock flow landslide
very slow downslope movement
soil creep landslide
happens with every slope with loose, weathered soil
soil creep landslide
characterized by a concave slump/curved plane of failure
slumping landslide
also known as mudslides, happens when the slope is saturated by water
debris flow landslide
when rocks slid down the slopes, usually caused by heavy rain
rock flow landslide
what are the five natural causes of landslides?
rainfall, earthquakes, volcanic eruptions, forest fire, gravity
what are the two artificial /human-made causes of landslides
mining and clear-cutting
what are the four signs of impending landslides
- earlier landslides
- tension cracks
- things moving
- water doing something different
slowand weak ground movement, could mean that the soil was loose, could lead to a much more massive landslide
earlier landslide
caused by stress or fiction by movement of geologic materials; cracks found on a high ground are landslide indicators
tension cracks
deformation of the terrain is a red flag; tree bending into a J-curve
things moving