Tuesday, May 8, 2007
Article
Sunday, May 6, 2007
Landslide Info
Landslide could be caused by two things, and they are by natural causes and human causes. This is an example of Natural Causes:
- Erosion by river.
- Glaciers melting.
- Ocean waves create over-steepened slopes.
- Rock and soil slopes are weaken through saturation or snow melt or heavy rains.
- Earthquakes create stresses that make weak slopes fail.
- Volcanic eruption produce loose ash deposits, heavy rain, and debris flows.
This is an example of Human Causes: - Vibrations from machinery.
- Traffic and road construction.
- Blasting.
- Stockpiling of rock or ore, from waste piles, or from man-made structures may stress weak slopes to failure and other structures.
- In shallow soils, the removal of deep-footed vegetation that binds the alluviums bedrock.
- Mining.
- Logging.
- Over-grazing.