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Upper course / lower course

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Upper course / lower course

This may seem like an obvious question, but as I revise for Geography AS, I cannot find anywhere that tells me where the river's flow is at its fastest. Is it in the upper course (despite friction and turbulence) or in the lower course (despite the lack of potential energy).

Reply 1

dd1989

This is GCSE stuff

http://www.bbc.co.uk/schools/gcsebitesize/geography/riverswater/riverfeaturesrev2.shtml

Reply 2

dd1989

This is GCSE stuff

http://www.bbc.co.uk/schools/gcsebitesize/geography/riverswater/riverfeaturesrev2.shtml

You know a river is moving quickly when it is able to hold sediment in suspension and carry it down-course, but as soon as it slows down, then deposition starts happening.

Reply 3

Genius12

A river will have the most kinetic energy (ie. faster) in the middle course, where the potential energy (due to height) from the upper course has been converted into kinetic energy. The river slows in the lower course due to typical widening of the river channel. This is why deposition is most in the lower course near the mouth ie. deltas (or alluvial fans on land).

Reply 4

Catchetat

I thought velocity is fastest in the lower course because of the hydraulic radius.

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