River Erosion Flashcards
What is the main process of erosion in the upper course of a river?
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Hydraulic action
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What is the main process of erosion in the upper course of a river?
What is attrition?
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Attrition is when sediment particles knock against the bed or each other and break, becoming more rounded and smaller as you move down the river.
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What is attrition?
What happens to the shape and size of bed load as you move down the river?
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It becomes more rounded and smaller.
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What happens to the shape and size of bed load as you move down the river?
What is the solution?
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Solution (or corrosion) is when acidic water dissolves rocks such as chalk or limestone.
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What is the solution?
What is hydraulic action?
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Hydraulic action is when the force of fast-flowing water hits the bed and banks and forces water and air into cracks in the bedrock. The repeated changes in air pressure cause the river bed to weaken.
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What is hydraulic action?
