Hydraulic action, abrasion, attrition and solution.
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What are the four types of transportation?
Traction, saltation, suspension and solution.
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Where does deposition take place in a river?
Lower course.
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What encourages river deposition?
When the volume of water in a river falls (drought period), when the amount of sediment increases, when the river's velocity decreases or when there is an obstruction.
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What processes occur at a meander?
Erosion on the outside and deposition on the inside.
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What is an ox-bow lake?
A u-shaped body of water formed when a wide meander from a river is cut off to form a lake.
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What is sequential deposition?
When a river drops the sediment it is transporting, heaviest first and lightest last.
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What is a levee?
A natural embankment along the edge of a river channel.
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What are the examples of hard engineering methods?
Dams and reservoirs, channel straightening, building concrete walls and embankments.
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What are the examples of soft engineering methods?
Afforestation, flood plain zoning, ecological flooding, preparation and flood warnings.
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What factors affect river discharge?
Rainfall, relief, rock type, land use, temperature and previous weather.
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