The Long Profile of a River Flashcards

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In the middle course of the river valley floor becomes wider why is this?
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The increase in lateral (sideways) erosion.

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In the middle course of the river valley floor becomes wider why is this?
Where is the steepest gradient in the long profile of a river?
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The steepest gradient in the long profile of a river is found in the upper course near to the source.

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Where is the steepest gradient in the long profile of a river?
Why do discharge and velocity increase downstream?
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Discharge increases downstream because of additional water from tributaries. Velocity increases due to the additional water from tributaries and less water is in contact with the bed and banks so there is less friction.

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Why do discharge and velocity increase downstream?
Why is the cross profile of a river valley narrow and steep sided in the upper course?
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It becomes narrow and steep-sided in the upper course due to vertical erosion.

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Why is the cross profile of a river valley narrow and steep sided in the upper course?
Why does the river channel become wider and deeper with distance downstream?
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The river channel becomes deeper due to the increase in discharge and wider due to lateral erosion.

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Why does the river channel become wider and deeper with distance downstream?




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