Minimising the Effects of Mass Movements (Grade 11 NSC Matric Geography): Flashcards
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Five human causes of mass movements
Five human causes of mass movements
Slope steepening, vegetation removal, construction, water, vibrations
What slope steepening involves
What slope steepening involves
Cutting into hillsides for roads/buildings, removes natural support
Effect of vegetation removal on slopes
Effect of vegetation removal on slopes
Soil loses root binding system, more susceptible to sliding/erosion
How water seepage affects mass movements
How water seepage affects mass movements
Lubricates particles, allows soil & rock to slide more easily
Sources of ground vibrations
Sources of ground vibrations
Earthquakes, mining operations, heavy vehicle traffic
Purpose of rock bolts
Purpose of rock bolts
Hold fractured rock layers together by creating artificial links
Function of drainage pipes in slopes
Function of drainage pipes in slopes
Allow groundwater to drain out, reduce water pressure in slopes
What rock barring involves
What rock barring involves
Systematically removing loose & dangerous rocks from hillsides
What half tunnels are
What half tunnels are
Built into cliffs, one side open, overhead protection from rockfalls
When Chapman's Peak Drive closed
When Chapman's Peak Drive closed
January 2000 due to safety concerns