Theme 2 Definitions continued

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Drainage basin
The area of land drained by a river and its tributaries
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Watershed
A ridge of high land surrounding a drainage basin
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Source
The start of a river
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Tributary
A smaller river that joins a main one
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Confluence
Where two rivers join
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Mouth
Where a river flows into the sea
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River channel
Where a river flows between two banks and over a bed
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Erosion
The wearing away of land
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Hydraulic action
The power of fast flowing water removing material
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Abrasion
Material is picked up by the river and rubbed against the bed and bank
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Attrition
Rocks on the riverbed roll into each other and become smaller and more rounded
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Corrosion
Acids in the water dissolve certain types of rock such as limestone
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Transportation
The carrying of material downstream by a river
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Traction
Large material is rolled along the bed
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Saltation
Smaller particles are picked up for a short distance and then dropped again bouncing
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Suspension
Very small particles are carried in the water making it look muddy or cloudy
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Solution
Some material that has been dissolved by corrosion
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Deposition
The dropping of material that the river is carrying when the flow slows down eg, when the river reaches the sea or on the inside of a meander bend
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Delta
Small islands created in the river mouth due to the deposition of material from the river when the flow slows down
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Upper course river feature
Waterfalls (erosional feature)
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Middle course river feature
Meanders (erosional and depositional feature)
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Lower course river feature
Deltas (depositional feature)
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Flood
When there is too much water reaching a river so it bursts its banks
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Longshore drift
Continual swash and backwash transports material sideways along the coast/beach
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Other cards in this set

Card 2

Front

A ridge of high land surrounding a drainage basin

Back

Watershed

Card 3

Front

The start of a river

Back

Preview of the back of card 3

Card 4

Front

A smaller river that joins a main one

Back

Preview of the back of card 4

Card 5

Front

Where two rivers join

Back

Preview of the back of card 5
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