Water on the Land

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A Rivers Course?
The path of a river as it flows downhill
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Properties in the upper course.
Steep gradient, v-shaped valley, narrow/shallow channel
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Properties in the middle course
medium gradient, gently sloping valley sides, wider/deeper channel
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Properties in the lower course
gentle gradient, wide almost flat valley, wide/deep channel
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Erosion
Wearing the river bed away
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Hydraulic Action
The force of the water breaks rock particles away from the river channel
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Abrasion
Eroded rocks picked up by the river scrape and rub against the channel wearing it away. Most common type of erosion
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Attrition
Eroded rocks picked up by the river smash into each other and break into smaller fragments.
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Solution
River water dissolves some types of rock such as chalk and limestone.
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Transportation
The movement of eroded material downstream
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Traction
Large particle like boulders are pushed along the river bed by the force of the water
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Saltation
Pebble-sized particles are bounced along the river bed by the force of the water
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Suspension
Small particles such as slit and clay are carried by the rivers flow
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Solution
Soluble materials dissolve in the water and are carried along by the rivers flow
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Discharge
The volume of water in the river
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Desposition
When a river drops the material its transporting
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Why rivers slow down and deposit material?
The discharge falls, the river reaches its mouth
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Other cards in this set

Card 2

Front

Steep gradient, v-shaped valley, narrow/shallow channel

Back

Properties in the upper course.

Card 3

Front

medium gradient, gently sloping valley sides, wider/deeper channel

Back

Preview of the back of card 3

Card 4

Front

gentle gradient, wide almost flat valley, wide/deep channel

Back

Preview of the back of card 4

Card 5

Front

Wearing the river bed away

Back

Preview of the back of card 5
View more cards

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