If a Side Stream Feeds Coarse Gravel into a River

question 14

Multiple Choice

If a side stream feeds coarse gravel into a river with a sandy bottom,what does the river do about it?

• A) The river flushes it down valley.
• B) The slope of the riverbed builds up until it is steep enough to transport the size of gravel supplied.
• C) The pebbles work themselves down through sediments in the riverbed until they reach bedrock.
• D) The pebbles dam the river channel.
• E) The water slows down because the larger sediment gets in the way.

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