| Impacts of Mass Movements | Factors that Affect Mass Movements | Causes of Mass Movements | Types of Mass Movements | Miscellaneous |
|---|---|---|---|---|
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Flooding
This harmful side effect occurs when landslides fall across rivers.
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Water
This exerts pressure which tends to push apart individual grains
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Gravity
This is the most important phenomenon acting upon slopes.
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Flows
These are result of water combining with soil, rock and other materials to decrease the viscosity of the mixture.
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Creep
Telephone poles being tilted on a hill are an example of this type of mass movement.
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Lake
The blockage of large areas of water and damming can cause the formation of this.
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Bedrock
This most commonly slides or falls due to the enlargement of joints during weathering.
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Acid Rain
Volcanic activity can lead to this, which contributes to mass movements through weathering.
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Lahars
These dangerous mass movements travel at speeds of approximately 20 to 40 mph.
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Trees
Positioning these on a muddy slope is a good idea to prevent mudflows and landslides.
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Deforestation
This increases the risk of landslides as it eliminates essential roots in soil.
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Between 30 and 60 degrees
Mass movements are more likely to occur when slopes are this.
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Earthquakes
These can disrupt the force of friction and cause sediment to be pulled downslope
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Falling, sliding, or flowing
These are the types of movement by which mass wasting is classified.
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Turtle
In Alberta 1903, a mass of 30.6 million cubic m slipped from this mountain.
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Soil Creep
This causes more long term economic damage to railroads, building structure and underground pipes.
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Cohesive
Vegetation on slopes keeps soil this.
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Creep
In regions with permafrost, the fluctuating freezing and thawing results in this.
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Slump
This occurs when one large piece of material breaks off instead of multiple smaller pieces
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Armero
23,000 people out of 25,000 were killed in a fatal landslide that occurred in 1985 in this Colombian city.
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-Damage to structure or property
-Loss of tax revenues on devalued properties -Reduced real estate values in landslide prone areas -Loss of productivity of agricultural lands -Loss of industrial productivity due to interruption of transportation systems
Name four expense losses due to mass movements.
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Stable Position
If the angle of a slope is steepened then the materials will collapse until they find this.
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-Mining
-Vibrations from heavy machinery and traffic -Stockpiling minerals and ore -Weight-loading from snow dumping -Waste piling -Building
Name six ways that human modifications can result in mass movements.
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Soil creep
Wet, soil particles increase in size and weight, and expand at right angles, causing this.
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Vargas, Venezuela
A landslide in this state was caused by a heavy storm that deposited 911 mm of rain in a few days
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