River environments -Slope processes

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  • Created by: hamishc
  • Created on: 02-02-16 20:47
What are slumps?
When weaker rocks like clay become saturated, they then conduct rotational movement along a curved slip-plane.
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What is soil creep?
Soil particles are pushed or heaved to the surface by wetting, heating or freezing. Once previous conditions return, gravity pulls the material back down, over time, material moves down the slope.
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What is surface wash?
When soil infiltration limits exceeded, water flows over the surface of the ground, can cause the formation of gullies due to erosional processes such as hydraulic action.
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What are rock falls?
When erosion weakens steep slopes, rocks detach and fall under the influence of gravity.
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What are slides?
When ground becomes saturated areas are soil cannot stay in place, the material slides down a gradient and maintains its shape and cohesion until it impacts the slopes bottom, leading to slumped terraces.
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What is through-flow?
When water moves down through the soil, it is channelled by natural pipes, giving it enough energy to transport material.
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What is sheetwash?
The un-channeled flow of water over the soil surface, capable of transporting material dislodged via rain-splash.
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What is rain-splash erosion?
When raindrops impact the soil and dislodge material. This process causes more erosion with a slop present.
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What factors influence slope processes?
Level of rainfall, diurnal temperature range, relief of slope, resistance of material.
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Other cards in this set

Card 2

Front

What is soil creep?

Back

Soil particles are pushed or heaved to the surface by wetting, heating or freezing. Once previous conditions return, gravity pulls the material back down, over time, material moves down the slope.

Card 3

Front

What is surface wash?

Back

Preview of the front of card 3

Card 4

Front

What are rock falls?

Back

Preview of the front of card 4

Card 5

Front

What are slides?

Back

Preview of the front of card 5
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