rivers & coast

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what is saltation?
larger particles are lifted and dropped along the river bed
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what is suspension?
smaller particles are carried along in the water like clay
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what is solution?
dissolved materials containing minerals are carried in the water
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what are the 4 erosive processes?
abrasion, attrition, solution, hydraulic action
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what is hydraulic action
force of water breaks particles away
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what is abrasion?
river widens and deepens by rocks rubbing and scraping against channel
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what is attrition?
rocks smash into each other and break into smaller fragments
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what is solution?
acids in water dissolve material
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what are the physical factors causing a river to flood?
prolonged rainfall, heavy rainfall, snowmelt, relief, geology
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what are the human factors causing a river to flood?
deforestation, urbanisation
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what are economic reasons to protect the coast?
loss of tourism, businesses, agricultural land, property prices fall
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what are social reasons to protect the coast?
deaths, water supplies, loss of housing, loss of jobs, damage to infrastructure
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what are environmental reasons to protect the coast?
ecosystems affected, SSSI threatened
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what is infilteration?
when water soaks into the soil
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what is percolation?
water moves vertically down through soil and rock
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what is throughflow?
water in the soil flows downhill
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what is groundwater flow
water in rock flows downhill
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what is surface runoff?
water flows overground
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what is channel flow?
flow of water in a river
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Other cards in this set

Card 2

Front

what is suspension?

Back

smaller particles are carried along in the water like clay

Card 3

Front

what is solution?

Back

Preview of the front of card 3

Card 4

Front

what are the 4 erosive processes?

Back

Preview of the front of card 4

Card 5

Front

what is hydraulic action

Back

Preview of the front of card 5
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