Changing River Characteristics Flashcards

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1
Q

Gradient

A

Becomes less steep

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2
Q

Cross-sectional area

A

Becomes greater

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3
Q

Discharge

A

Becomes greater

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4
Q

Processes of erosion, transportation and deposition

A

There is lots of erosion in the upper course.
Erosion, transportation and deposition all take place in the middle course.
Some erosion and transportation takes place in the lower course, but mostly deposition takes place here.

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5
Q

Size and roundness of the load

A

Particles become smaller and more rounded

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6
Q

Explain why the load becomes smaller as you move downstream.

A

Particles knock together through the process of attrition and break up into smaller pieces.

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7
Q

Explain why the load becomes more rounded as you move downstream.

A

Sharp angular edges get knocked off by abrasion

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8
Q

Explain why the gradient becomes less steep as you move downstream.

A

There is more vertical erosion near the source and more lateral erosion near the mouth.

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9
Q

Explain why the river becomes deeper as you move downstream.

A

The river vertically erodes as it travels.

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10
Q

Explain why the river becomes wider as you move downstream.

A

The river laterally erodes as it travels.

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11
Q

Explain why river discharge increases as you move downstream, and how this impacts the water flow.

A

More water flows into the river as it passes each tributary, which causes the water to travel faster with less friction.

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