Unformatted text preview: ivities at base of mountain?
17 - underwelming slow: Important Forms of Mass Wasting - freeze, thaw cycles (like London) Creep
- curved trucks, trees go upward, adjusting their growth because Expansion and contraction
of surface material leads to
gradual movement of soil
__________ the creep - damage (wall, fences, graveyards) 18 6 Urbanization and Natural Hazards Natural Processes
+ Human activity
+ Population density
= Potential Hazard!
19 Human Influence
Humans have variable influence – have lots of ways to
prevent landslides, but also cause them!
Causes of landslides (mass wasting events)
Weakening of slope material by saturation by water and
weather if rock and soil (land use changes like clear cutting and __________
agriculture) Steepening of the slope by artificial or natural undercutting of
toe of slope (for building and roads)
Addition of weight at top of slope (dams, buildings,
Humans are sculpting the surface of the earth faster than
natural processes – no slope is too rugged for development
bad planning (added weight) Effects of
stability Montgomery, 1998 21 7 Two Important Requirements for Mitigating Landslide
Damage (policy) 1. Awareness of municipal government toward need for buildin...
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- Fall '14